# Periodic Table of Elements — Full Structured Dump > The free, citation-ready periodic table of elements — 118 guides, trends, calculators, and printable PDFs. Complete per-element data dump optimized for AI/LLM ingestion. For the concise index see /llms.txt. Each element block contains: Quick Facts (numeric fields), Discovery, and a pointer to the full HTML page with summary, properties, isotopes, uses, occurrence, safety notes, and FAQs. --- ## Tren periodik (11) ### Electronegativity (Pauling) A measure of the tendency of an atom to attract a bonding pair of electrons. Page: https://periodic-table-of-elements.top/trends/electronegativity --- ### Atomic Radius (pm) The distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. Page: https://periodic-table-of-elements.top/trends/atomic_radius --- ### Ionization Energy (kJ/mol) The energy required to remove the most loosely bound electron from a neutral gaseous atom. Page: https://periodic-table-of-elements.top/trends/ionization_energy --- ### Melting Point (K) The temperature at which the solid phase of a pure substance is in equilibrium with its liquid phase at atmospheric pressure. Page: https://periodic-table-of-elements.top/trends/melting_point --- ### Density at STP (g/cm3) Mass per unit volume of a substance at standard temperature and pressure. Page: https://periodic-table-of-elements.top/trends/density_stp --- ### Boiling Point (K) The temperature at which the vapor pressure of a liquid equals the external atmospheric pressure. Page: https://periodic-table-of-elements.top/trends/boiling_point --- ### Atomic Mass (u) The mass of an atom, typically expressed in unified atomic mass units. Page: https://periodic-table-of-elements.top/trends/atomic_mass --- ### Electron Affinity (kJ/mol) The amount of energy released when an electron is added to a neutral atom in the gaseous state. Page: https://periodic-table-of-elements.top/trends/electron_affinity --- ### Thermal Conductivity (W/(m·K)) Rate at which heat flows through a material. Metals conduct heat well; gases and nonmetals poorly. Page: https://periodic-table-of-elements.top/trends/thermal_conductivity --- ### Crustal Abundance (mg/kg) How much of the element is found in the Earth's crust, measured in milligrams per kilogram of crustal rock. Page: https://periodic-table-of-elements.top/trends/abundance_crust --- ### Oxidation States (count) Number of distinct oxidation states the element commonly exhibits in compounds. Page: https://periodic-table-of-elements.top/trends/oxidation_states --- ## Tools (4) ### Molar Mass Calculator Compute molecular weight from chemical formulas; supports hydrates (·nH2O), nested brackets, square-bracket complexes, and standalone ion notation. Page: https://periodic-table-of-elements.top/tools/molar-mass-calculator --- ### Equation Balancer Balance chemical equations with arbitrary reactants and products using an integer-LCM algorithm; rejects unbalanceable inputs. Page: https://periodic-table-of-elements.top/tools/balance-equation --- ### Electron Configuration Calculator Full and shorthand electron configuration for any of the 118 elements with orbital diagrams and 13 documented anomalous ground states (Cr, Cu, Mo, Pd, Au, La, Gd, ...). Page: https://periodic-table-of-elements.top/tools/electron-configuration-calculator --- ### Element Comparator Side-by-side comparison of any subset of the 118 elements across atomic, thermodynamic, electrical, and abundance properties. Page: https://periodic-table-of-elements.top/tools/compare-elements --- ## Quizzes (4) ### Element Symbol Quiz Multiple-choice drills matching element names to symbols. Three difficulty levels; tracks the last 10 attempts in localStorage. Page: https://periodic-table-of-elements.top/quizzes/element-symbol-quiz --- ### Atomic Number Quiz Identify an element from its atomic number and a clue. Three difficulty levels; recent-attempts history is preserved locally. Page: https://periodic-table-of-elements.top/quizzes/atomic-number-quiz --- ### Category Quiz Place elements into their periodic-table category (alkali metal, transition metal, noble gas, ...). Three difficulty levels. Page: https://periodic-table-of-elements.top/quizzes/category-quiz --- ### Electron Configuration Quiz Identify elements from a partial electron configuration clue. Three difficulty levels. Page: https://periodic-table-of-elements.top/quizzes/electron-config-quiz --- ## Learn (9) ### Apa Itu Isotop? Definisi, Contoh, dan Mengapa Itu Penting Penjelasan sederhana tentang isotop, notasi isotop, stabilitas, waktu paruh, dan peran isotop dalam kedokteran, arkeologi, dan energi nuklir. Page: https://periodic-table-of-elements.top/learn/what-are-isotopes Reading time: ~6 min --- ### Cara Membaca Tabel Periodik: Panduan Pemula Panduan praktis tentang setiap bagian sel tabel periodik — nomor atom, simbol, massa atom, golongan, periode, blok, kategori — dengan contoh mulai dari hidrogen hingga oganeson. Page: https://periodic-table-of-elements.top/learn/how-to-read-the-periodic-table Reading time: ~7 min --- ### Cara Menghafal Tabel Periodik: Simbol, Angka, dan Kategori Strategi mnemonik yang terbukti untuk mempelajari simbol unsur dan nomor atom tanpa menghafal secara brute force. Pengulangan spasi, pengelompokan, dan pengenalan pola. Page: https://periodic-table-of-elements.top/learn/how-to-memorize-element-symbols Reading time: ~8 min --- ### Massa Atom vs Nomor Massa: Apa Bedanya? Nomor massa menghitung nukleon individu; massa atom adalah rata-rata tertimbang di semua isotop. Panduan ini membahas keduanya, menunjukkan tampilannya dalam tabel periodik, dan menjelaskan notasi tanda kurung untuk unsur tidak stabil. Page: https://periodic-table-of-elements.top/learn/atomic-mass-vs-mass-number Reading time: ~5 min --- ### Mengapa Unsur Memiliki Sifat Berbeda: Hukum Periodik Unsur yang berbeda berbeda karena konfigurasi elektronnya. Panduan ini menghubungkan jumlah proton, jumlah elektron, kulit valensi, hingga kimia, dengan contoh nyata dari seluruh tabel periodik. Page: https://periodic-table-of-elements.top/learn/why-elements-have-different-properties Reading time: ~7 min --- ### Penjelasan Golongan Tabel Periodik: 18 Kolom dan Kimianya Arti dari 18 golongan (kolom) tabel periodik, alasan unsur-unsur dalam golongan yang sama berperilaku serupa, dan pola masing-masing yang memungkinkan Anda memprediksi sifat kimia. Page: https://periodic-table-of-elements.top/learn/periodic-table-groups-explained Reading time: ~9 min --- ### Penjelasan Konfigurasi Elektron: Aufbau, Kulit, dan Singkatan Panduan jelas tentang notasi konfigurasi elektron, urutan pengisian Aufbau, kulit vs subkulit, dan cara membaca konfigurasi unsur apa pun dari hidrogen hingga oganeson. Page: https://periodic-table-of-elements.top/learn/electron-configuration-explained Reading time: ~8 min --- ### Penjelasan Periode Tabel Periodik: 7 Baris dan Polanya Bagaimana 7 baris horizontal (periode) tabel periodik mengkodekan jumlah kulit elektron, dan gelombang kimia yang dapat diprediksi yang berulang setiap periode. Page: https://periodic-table-of-elements.top/learn/periodic-table-periods-explained Reading time: ~7 min --- ### Sejarah Singkat Tabel Periodik: Dari Triad hingga Oganesson Bagaimana ahli kimia abad ke-19 memperhatikan pola berulang dalam unsur-unsur, menyusunnya menjadi tabel yang lebih baik, memperkirakan unsur-unsur yang hilang, dan sampai pada tabel 118 unsur yang kita gunakan saat ini. Page: https://periodic-table-of-elements.top/learn/periodic-table-history Reading time: ~8 min --- ## Semua unsur (118) # Hydrogen (H) — Atomic Number 1 URL: https://periodic-table-of-elements.top/elements/hydrogen ## Quick Facts - Atomic Number: 1 - Atomic Mass: 1.008 u - Symbol: H - Category: reactive nonmetal - Group: 1, Period: 1 - Block: p - Electron Configuration: 1s1 - Electronegativity: 2.2 (Pauling) - Melting Point: 14.01 K - Boiling Point: 20.28 K - Density (STP): 0.00008989999999999999 g/cm³ - Discovered: 1766 ## Element page: https://periodic-table-of-elements.top/elements/hydrogen --- # Helium (He) — Atomic Number 2 URL: https://periodic-table-of-elements.top/elements/helium ## Quick Facts - Atomic Number: 2 - Atomic Mass: 4.002602 u - Symbol: He - Category: noble gas - Group: 18, Period: 1 - Block: p - Electron Configuration: 1s2 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: 4.22 K - Density (STP): 0.0001785 g/cm³ - Discovered: 1895 ## Element page: https://periodic-table-of-elements.top/elements/helium --- # Lithium (Li) — Atomic Number 3 URL: https://periodic-table-of-elements.top/elements/lithium ## Quick Facts - Atomic Number: 3 - Atomic Mass: 6.94 u - Symbol: Li - Category: alkali metal - Group: 1, Period: 2 - Block: s - Electron Configuration: [He] 2s1 - Electronegativity: 0.98 (Pauling) - Melting Point: 453.69 K - Boiling Point: 1615 K - Density (STP): 0.535 g/cm³ - Discovered: 1817 ## Element page: https://periodic-table-of-elements.top/elements/lithium --- # Beryllium (Be) — Atomic Number 4 URL: https://periodic-table-of-elements.top/elements/beryllium ## Quick Facts - Atomic Number: 4 - Atomic Mass: 9.0121831 u - Symbol: Be - Category: alkaline earth metal - Group: 2, Period: 2 - Block: s - Electron Configuration: [He] 2s2 - Electronegativity: 1.57 (Pauling) - Melting Point: 1560 K - Boiling Point: 2743 K - Density (STP): 1.848 g/cm³ - Discovered: 1797 ## Element page: https://periodic-table-of-elements.top/elements/beryllium --- # Boron (B) — Atomic Number 5 URL: https://periodic-table-of-elements.top/elements/boron ## Quick Facts - Atomic Number: 5 - Atomic Mass: 10.81 u - Symbol: B - Category: metalloid - Group: 11, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p1 - Electronegativity: 2.04 (Pauling) - Melting Point: 2348 K - Boiling Point: 4273 K - Density (STP): 2.46 g/cm³ - Discovered: 1808 ## Element page: https://periodic-table-of-elements.top/elements/boron --- # Carbon (C) — Atomic Number 6 URL: https://periodic-table-of-elements.top/elements/carbon ## Quick Facts - Atomic Number: 6 - Atomic Mass: 12.011 u - Symbol: C - Category: reactive nonmetal - Group: 12, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p2 - Electronegativity: 2.55 (Pauling) - Melting Point: 3915 K - Boiling Point: 3915 K - Density (STP): 2.26 g/cm³ - Discovered: -3749 ## Element page: https://periodic-table-of-elements.top/elements/carbon --- # Nitrogen (N) — Atomic Number 7 URL: https://periodic-table-of-elements.top/elements/nitrogen ## Quick Facts - Atomic Number: 7 - Atomic Mass: 14.007 u - Symbol: N - Category: reactive nonmetal - Group: 13, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p3 - Electronegativity: 3.04 (Pauling) - Melting Point: 63.05 K - Boiling Point: 77.36 K - Density (STP): 0.001251 g/cm³ - Discovered: 1772 ## Element page: https://periodic-table-of-elements.top/elements/nitrogen --- # Oxygen (O) — Atomic Number 8 URL: https://periodic-table-of-elements.top/elements/oxygen ## Quick Facts - Atomic Number: 8 - Atomic Mass: 15.999 u - Symbol: O - Category: reactive nonmetal - Group: 14, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p4 - Electronegativity: 3.44 (Pauling) - Melting Point: 54.8 K - Boiling Point: 90.2 K - Density (STP): 0.0014290000000000001 g/cm³ - Discovered: 1774 ## Element page: https://periodic-table-of-elements.top/elements/oxygen --- # Fluorine (F) — Atomic Number 9 URL: https://periodic-table-of-elements.top/elements/fluorine ## Quick Facts - Atomic Number: 9 - Atomic Mass: 18.998403162 u - Symbol: F - Category: reactive nonmetal - Group: 15, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p5 - Electronegativity: 3.98 (Pauling) - Melting Point: 53.5 K - Boiling Point: 85.03 K - Density (STP): 0.001696 g/cm³ - Discovered: 1886 ## Element page: https://periodic-table-of-elements.top/elements/fluorine --- # Neon (Ne) — Atomic Number 10 URL: https://periodic-table-of-elements.top/elements/neon ## Quick Facts - Atomic Number: 10 - Atomic Mass: 20.1797 u - Symbol: Ne - Category: noble gas - Group: 16, Period: 2 - Block: p - Electron Configuration: [He] 2s2 2p6 - Electronegativity: unknown (Pauling) - Melting Point: 24.56 K - Boiling Point: 27.07 K - Density (STP): 0.0009 g/cm³ - Discovered: 1898 ## Element page: https://periodic-table-of-elements.top/elements/neon --- # Sodium (Na) — Atomic Number 11 URL: https://periodic-table-of-elements.top/elements/sodium ## Quick Facts - Atomic Number: 11 - Atomic Mass: 22.98976928 u - Symbol: Na - Category: alkali metal - Group: 1, Period: 3 - Block: s - Electron Configuration: [Ne] 3s1 - Electronegativity: 0.93 (Pauling) - Melting Point: 370.87 K - Boiling Point: 1156 K - Density (STP): 0.968 g/cm³ - Discovered: 1807 ## Element page: https://periodic-table-of-elements.top/elements/sodium --- # Magnesium (Mg) — Atomic Number 12 URL: https://periodic-table-of-elements.top/elements/magnesium ## Quick Facts - Atomic Number: 12 - Atomic Mass: 24.305 u - Symbol: Mg - Category: alkaline earth metal - Group: 2, Period: 3 - Block: s - Electron Configuration: [Ne] 3s2 - Electronegativity: 1.31 (Pauling) - Melting Point: 923 K - Boiling Point: 1363 K - Density (STP): 1.738 g/cm³ - Discovered: 1755 ## Element page: https://periodic-table-of-elements.top/elements/magnesium --- # Aluminum (Al) — Atomic Number 13 URL: https://periodic-table-of-elements.top/elements/aluminum ## Quick Facts - Atomic Number: 13 - Atomic Mass: 26.9815384 u - Symbol: Al - Category: post-transition metal - Group: 13, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p1 - Electronegativity: 1.61 (Pauling) - Melting Point: 933.47 K - Boiling Point: 2792 K - Density (STP): 2.7 g/cm³ - Discovered: 1825 ## Element page: https://periodic-table-of-elements.top/elements/aluminum --- # Silicon (Si) — Atomic Number 14 URL: https://periodic-table-of-elements.top/elements/silicon ## Quick Facts - Atomic Number: 14 - Atomic Mass: 28.085 u - Symbol: Si - Category: metalloid - Group: 14, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p2 - Electronegativity: 1.9 (Pauling) - Melting Point: 1687 K - Boiling Point: 3173 K - Density (STP): 2.33 g/cm³ - Discovered: 1824 ## Element page: https://periodic-table-of-elements.top/elements/silicon --- # Phosphorus (P) — Atomic Number 15 URL: https://periodic-table-of-elements.top/elements/phosphorus ## Quick Facts - Atomic Number: 15 - Atomic Mass: 30.973761998 u - Symbol: P - Category: reactive nonmetal - Group: 15, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p3 - Electronegativity: 2.19 (Pauling) - Melting Point: 317.3 K - Boiling Point: 553.6 K - Density (STP): 1.823 g/cm³ - Discovered: 1669 ## Element page: https://periodic-table-of-elements.top/elements/phosphorus --- # Sulfur (S) — Atomic Number 16 URL: https://periodic-table-of-elements.top/elements/sulfur ## Quick Facts - Atomic Number: 16 - Atomic Mass: 32.06 u - Symbol: S - Category: reactive nonmetal - Group: 16, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p4 - Electronegativity: 2.58 (Pauling) - Melting Point: 388.36 K - Boiling Point: 717.87 K - Density (STP): 1.96 g/cm³ - Discovered: -499 ## Element page: https://periodic-table-of-elements.top/elements/sulfur --- # Chlorine (Cl) — Atomic Number 17 URL: https://periodic-table-of-elements.top/elements/chlorine ## Quick Facts - Atomic Number: 17 - Atomic Mass: 35.45 u - Symbol: Cl - Category: reactive nonmetal - Group: 17, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p5 - Electronegativity: 3.16 (Pauling) - Melting Point: 171.6 K - Boiling Point: 239.11 K - Density (STP): 0.003214 g/cm³ - Discovered: 1774 ## Element page: https://periodic-table-of-elements.top/elements/chlorine --- # Argon (Ar) — Atomic Number 18 URL: https://periodic-table-of-elements.top/elements/argon ## Quick Facts - Atomic Number: 18 - Atomic Mass: 39.948 u - Symbol: Ar - Category: noble gas - Group: 18, Period: 3 - Block: p - Electron Configuration: [Ne] 3s2 3p6 - Electronegativity: unknown (Pauling) - Melting Point: 83.8 K - Boiling Point: 87.3 K - Density (STP): 0.001784 g/cm³ - Discovered: 1894 ## Element page: https://periodic-table-of-elements.top/elements/argon --- # Potassium (K) — Atomic Number 19 URL: https://periodic-table-of-elements.top/elements/potassium ## Quick Facts - Atomic Number: 19 - Atomic Mass: 39.0983 u - Symbol: K - Category: alkali metal - Group: 1, Period: 4 - Block: s - Electron Configuration: [Ar] 4s1 - Electronegativity: 0.82 (Pauling) - Melting Point: 336.53 K - Boiling Point: 1032 K - Density (STP): 0.856 g/cm³ - Discovered: 1807 ## Element page: https://periodic-table-of-elements.top/elements/potassium --- # Calcium (Ca) — Atomic Number 20 URL: https://periodic-table-of-elements.top/elements/calcium ## Quick Facts - Atomic Number: 20 - Atomic Mass: 40.078 u - Symbol: Ca - Category: alkaline earth metal - Group: 2, Period: 4 - Block: s - Electron Configuration: [Ar] 4s2 - Electronegativity: 1 (Pauling) - Melting Point: 1115 K - Boiling Point: 1757 K - Density (STP): 1.55 g/cm³ - Discovered: 1808 ## Element page: https://periodic-table-of-elements.top/elements/calcium --- # Scandium (Sc) — Atomic Number 21 URL: https://periodic-table-of-elements.top/elements/scandium ## Quick Facts - Atomic Number: 21 - Atomic Mass: 44.955907 u - Symbol: Sc - Category: transition metal - Group: 3, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d1 - Electronegativity: 1.36 (Pauling) - Melting Point: 1814 K - Boiling Point: 3103 K - Density (STP): 2.985 g/cm³ - Discovered: 1879 ## Element page: https://periodic-table-of-elements.top/elements/scandium --- # Titanium (Ti) — Atomic Number 22 URL: https://periodic-table-of-elements.top/elements/titanium ## Quick Facts - Atomic Number: 22 - Atomic Mass: 47.867 u - Symbol: Ti - Category: transition metal - Group: 4, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d2 - Electronegativity: 1.54 (Pauling) - Melting Point: 1941 K - Boiling Point: 3560 K - Density (STP): 4.507 g/cm³ - Discovered: 1791 ## Element page: https://periodic-table-of-elements.top/elements/titanium --- # Vanadium (V) — Atomic Number 23 URL: https://periodic-table-of-elements.top/elements/vanadium ## Quick Facts - Atomic Number: 23 - Atomic Mass: 50.9415 u - Symbol: V - Category: transition metal - Group: 5, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d3 - Electronegativity: 1.63 (Pauling) - Melting Point: 2183 K - Boiling Point: 3680 K - Density (STP): 6.11 g/cm³ - Discovered: 1801 ## Element page: https://periodic-table-of-elements.top/elements/vanadium --- # Chromium (Cr) — Atomic Number 24 URL: https://periodic-table-of-elements.top/elements/chromium ## Quick Facts - Atomic Number: 24 - Atomic Mass: 51.9961 u - Symbol: Cr - Category: transition metal - Group: 6, Period: 4 - Block: d - Electron Configuration: [Ar] 4s1 3d5 - Electronegativity: 1.66 (Pauling) - Melting Point: 2180 K - Boiling Point: 2944 K - Density (STP): 7.19 g/cm³ - Discovered: 1797 ## Element page: https://periodic-table-of-elements.top/elements/chromium --- # Manganese (Mn) — Atomic Number 25 URL: https://periodic-table-of-elements.top/elements/manganese ## Quick Facts - Atomic Number: 25 - Atomic Mass: 54.938043 u - Symbol: Mn - Category: transition metal - Group: 7, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d5 - Electronegativity: 1.55 (Pauling) - Melting Point: 1519 K - Boiling Point: 2334 K - Density (STP): 7.47 g/cm³ - Discovered: 1774 ## Element page: https://periodic-table-of-elements.top/elements/manganese --- # Iron (Fe) — Atomic Number 26 URL: https://periodic-table-of-elements.top/elements/iron ## Quick Facts - Atomic Number: 26 - Atomic Mass: 55.845 u - Symbol: Fe - Category: transition metal - Group: 8, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d6 - Electronegativity: 1.83 (Pauling) - Melting Point: 1811 K - Boiling Point: 3134 K - Density (STP): 7.874 g/cm³ - Discovered: -1999 ## Element page: https://periodic-table-of-elements.top/elements/iron --- # Cobalt (Co) — Atomic Number 27 URL: https://periodic-table-of-elements.top/elements/cobalt ## Quick Facts - Atomic Number: 27 - Atomic Mass: 58.933194 u - Symbol: Co - Category: transition metal - Group: 9, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d7 - Electronegativity: 1.88 (Pauling) - Melting Point: 1768 K - Boiling Point: 3200 K - Density (STP): 8.9 g/cm³ - Discovered: 1735 ## Element page: https://periodic-table-of-elements.top/elements/cobalt --- # Nickel (Ni) — Atomic Number 28 URL: https://periodic-table-of-elements.top/elements/nickel ## Quick Facts - Atomic Number: 28 - Atomic Mass: 58.6934 u - Symbol: Ni - Category: transition metal - Group: 10, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d8 - Electronegativity: 1.91 (Pauling) - Melting Point: 1728 K - Boiling Point: 3186 K - Density (STP): 8.908 g/cm³ - Discovered: 1751 ## Element page: https://periodic-table-of-elements.top/elements/nickel --- # Copper (Cu) — Atomic Number 29 URL: https://periodic-table-of-elements.top/elements/copper ## Quick Facts - Atomic Number: 29 - Atomic Mass: 63.546 u - Symbol: Cu - Category: transition metal - Group: 11, Period: 4 - Block: d - Electron Configuration: [Ar] 4s1 3d10 - Electronegativity: 1.9 (Pauling) - Melting Point: 1357.77 K - Boiling Point: 2835 K - Density (STP): 8.96 g/cm³ - Discovered: -7999 ## Element page: https://periodic-table-of-elements.top/elements/copper --- # Zinc (Zn) — Atomic Number 30 URL: https://periodic-table-of-elements.top/elements/zinc ## Quick Facts - Atomic Number: 30 - Atomic Mass: 65.38 u - Symbol: Zn - Category: transition metal - Group: 12, Period: 4 - Block: d - Electron Configuration: [Ar] 4s2 3d10 - Electronegativity: 1.65 (Pauling) - Melting Point: 692.68 K - Boiling Point: 1180 K - Density (STP): 7.14 g/cm³ - Discovered: 1500 ## Element page: https://periodic-table-of-elements.top/elements/zinc --- # Gallium (Ga) — Atomic Number 31 URL: https://periodic-table-of-elements.top/elements/gallium ## Quick Facts - Atomic Number: 31 - Atomic Mass: 69.723 u - Symbol: Ga - Category: post-transition metal - Group: 13, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p1 - Electronegativity: 1.81 (Pauling) - Melting Point: 302.91 K - Boiling Point: 2477 K - Density (STP): 5.904 g/cm³ - Discovered: 1875 ## Element page: https://periodic-table-of-elements.top/elements/gallium --- # Germanium (Ge) — Atomic Number 32 URL: https://periodic-table-of-elements.top/elements/germanium ## Quick Facts - Atomic Number: 32 - Atomic Mass: 72.63 u - Symbol: Ge - Category: metalloid - Group: 14, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p2 - Electronegativity: 2.01 (Pauling) - Melting Point: 1211.4 K - Boiling Point: 3093 K - Density (STP): 5.323 g/cm³ - Discovered: 1886 ## Element page: https://periodic-table-of-elements.top/elements/germanium --- # Arsenic (As) — Atomic Number 33 URL: https://periodic-table-of-elements.top/elements/arsenic ## Quick Facts - Atomic Number: 33 - Atomic Mass: 74.921595 u - Symbol: As - Category: metalloid - Group: 15, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p3 - Electronegativity: 2.18 (Pauling) - Melting Point: 1090 K - Boiling Point: 887 K - Density (STP): 5.727 g/cm³ - Discovered: 1250 ## Element page: https://periodic-table-of-elements.top/elements/arsenic --- # Selenium (Se) — Atomic Number 34 URL: https://periodic-table-of-elements.top/elements/selenium ## Quick Facts - Atomic Number: 34 - Atomic Mass: 78.971 u - Symbol: Se - Category: reactive nonmetal - Group: 16, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p4 - Electronegativity: 2.55 (Pauling) - Melting Point: 494 K - Boiling Point: 958 K - Density (STP): 4.819 g/cm³ - Discovered: 1817 ## Element page: https://periodic-table-of-elements.top/elements/selenium --- # Bromine (Br) — Atomic Number 35 URL: https://periodic-table-of-elements.top/elements/bromine ## Quick Facts - Atomic Number: 35 - Atomic Mass: 79.904 u - Symbol: Br - Category: reactive nonmetal - Group: 17, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p5 - Electronegativity: 2.96 (Pauling) - Melting Point: 265.8 K - Boiling Point: 332 K - Density (STP): 3.12 g/cm³ - Discovered: 1826 ## Element page: https://periodic-table-of-elements.top/elements/bromine --- # Krypton (Kr) — Atomic Number 36 URL: https://periodic-table-of-elements.top/elements/krypton ## Quick Facts - Atomic Number: 36 - Atomic Mass: 83.798 u - Symbol: Kr - Category: noble gas - Group: 18, Period: 4 - Block: p - Electron Configuration: [Ar] 4s2 3d10 4p6 - Electronegativity: 3 (Pauling) - Melting Point: 115.79 K - Boiling Point: 119.93 K - Density (STP): 0.00375 g/cm³ - Discovered: 1898 ## Element page: https://periodic-table-of-elements.top/elements/krypton --- # Rubidium (Rb) — Atomic Number 37 URL: https://periodic-table-of-elements.top/elements/rubidium ## Quick Facts - Atomic Number: 37 - Atomic Mass: 85.4678 u - Symbol: Rb - Category: alkali metal - Group: 1, Period: 5 - Block: s - Electron Configuration: [Kr] 5s1 - Electronegativity: 0.82 (Pauling) - Melting Point: 312.46 K - Boiling Point: 961 K - Density (STP): 1.532 g/cm³ - Discovered: 1861 ## Element page: https://periodic-table-of-elements.top/elements/rubidium --- # Strontium (Sr) — Atomic Number 38 URL: https://periodic-table-of-elements.top/elements/strontium ## Quick Facts - Atomic Number: 38 - Atomic Mass: 87.62 u - Symbol: Sr - Category: alkaline earth metal - Group: 2, Period: 5 - Block: s - Electron Configuration: [Kr] 5s2 - Electronegativity: 0.95 (Pauling) - Melting Point: 1050 K - Boiling Point: 1655 K - Density (STP): 2.63 g/cm³ - Discovered: 1790 ## Element page: https://periodic-table-of-elements.top/elements/strontium --- # Yttrium (Y) — Atomic Number 39 URL: https://periodic-table-of-elements.top/elements/yttrium ## Quick Facts - Atomic Number: 39 - Atomic Mass: 88.905838 u - Symbol: Y - Category: transition metal - Group: 3, Period: 5 - Block: d - Electron Configuration: [Kr] 5s2 4d1 - Electronegativity: 1.22 (Pauling) - Melting Point: 1799 K - Boiling Point: 3618 K - Density (STP): 4.472 g/cm³ - Discovered: 1794 ## Element page: https://periodic-table-of-elements.top/elements/yttrium --- # Zirconium (Zr) — Atomic Number 40 URL: https://periodic-table-of-elements.top/elements/zirconium ## Quick Facts - Atomic Number: 40 - Atomic Mass: 91.224 u - Symbol: Zr - Category: transition metal - Group: 4, Period: 5 - Block: d - Electron Configuration: [Kr] 5s2 4d2 - Electronegativity: 1.33 (Pauling) - Melting Point: 2128 K - Boiling Point: 4682 K - Density (STP): 6.511 g/cm³ - Discovered: 1789 ## Element page: https://periodic-table-of-elements.top/elements/zirconium --- # Niobium (Nb) — Atomic Number 41 URL: https://periodic-table-of-elements.top/elements/niobium ## Quick Facts - Atomic Number: 41 - Atomic Mass: 92.90637 u - Symbol: Nb - Category: transition metal - Group: 5, Period: 5 - Block: d - Electron Configuration: [Kr] 5s1 4d4 - Electronegativity: 1.6 (Pauling) - Melting Point: 2750 K - Boiling Point: 5017 K - Density (STP): 8.57 g/cm³ - Discovered: 1801 ## Element page: https://periodic-table-of-elements.top/elements/niobium --- # Molybdenum (Mo) — Atomic Number 42 URL: https://periodic-table-of-elements.top/elements/molybdenum ## Quick Facts - Atomic Number: 42 - Atomic Mass: 95.95 u - Symbol: Mo - Category: transition metal - Group: 6, Period: 5 - Block: d - Electron Configuration: [Kr] 5s1 4d5 - Electronegativity: 2.16 (Pauling) - Melting Point: 2896 K - Boiling Point: 4912 K - Density (STP): 10.28 g/cm³ - Discovered: 1781 ## Element page: https://periodic-table-of-elements.top/elements/molybdenum --- # Technetium (Tc) — Atomic Number 43 URL: https://periodic-table-of-elements.top/elements/technetium ## Quick Facts - Atomic Number: 43 - Atomic Mass: 98 u - Symbol: Tc - Category: transition metal - Group: 7, Period: 5 - Block: d - Electron Configuration: [Kr] 5s2 4d5 - Electronegativity: 1.9 (Pauling) - Melting Point: 2430 K - Boiling Point: 4538 K - Density (STP): 11.5 g/cm³ - Discovered: 1937 ## Element page: https://periodic-table-of-elements.top/elements/technetium --- # Ruthenium (Ru) — Atomic Number 44 URL: https://periodic-table-of-elements.top/elements/ruthenium ## Quick Facts - Atomic Number: 44 - Atomic Mass: 101.07 u - Symbol: Ru - Category: transition metal - Group: 8, Period: 5 - Block: d - Electron Configuration: [Kr] 5s1 4d7 - Electronegativity: 2.2 (Pauling) - Melting Point: 2607 K - Boiling Point: 4423 K - Density (STP): 12.37 g/cm³ - Discovered: 1844 ## Element page: https://periodic-table-of-elements.top/elements/ruthenium --- # Rhodium (Rh) — Atomic Number 45 URL: https://periodic-table-of-elements.top/elements/rhodium ## Quick Facts - Atomic Number: 45 - Atomic Mass: 102.90549 u - Symbol: Rh - Category: transition metal - Group: 9, Period: 5 - Block: d - Electron Configuration: [Kr] 5s1 4d8 - Electronegativity: 2.28 (Pauling) - Melting Point: 2237 K - Boiling Point: 3968 K - Density (STP): 12.45 g/cm³ - Discovered: 1803 ## Element page: https://periodic-table-of-elements.top/elements/rhodium --- # Palladium (Pd) — Atomic Number 46 URL: https://periodic-table-of-elements.top/elements/palladium ## Quick Facts - Atomic Number: 46 - Atomic Mass: 106.42 u - Symbol: Pd - Category: transition metal - Group: 10, Period: 5 - Block: d - Electron Configuration: [Kr] 4d10 - Electronegativity: 2.2 (Pauling) - Melting Point: 1828.05 K - Boiling Point: 3236 K - Density (STP): 12.023 g/cm³ - Discovered: 1803 ## Element page: https://periodic-table-of-elements.top/elements/palladium --- # Silver (Ag) — Atomic Number 47 URL: https://periodic-table-of-elements.top/elements/silver ## Quick Facts - Atomic Number: 47 - Atomic Mass: 107.8682 u - Symbol: Ag - Category: transition metal - Group: 11, Period: 5 - Block: d - Electron Configuration: [Kr] 5s1 4d10 - Electronegativity: 1.93 (Pauling) - Melting Point: 1234.93 K - Boiling Point: 2435 K - Density (STP): 10.49 g/cm³ - Discovered: -2999 ## Element page: https://periodic-table-of-elements.top/elements/silver --- # Cadmium (Cd) — Atomic Number 48 URL: https://periodic-table-of-elements.top/elements/cadmium ## Quick Facts - Atomic Number: 48 - Atomic Mass: 112.414 u - Symbol: Cd - Category: transition metal - Group: 12, Period: 5 - Block: d - Electron Configuration: [Kr] 5s2 4d10 - Electronegativity: 1.69 (Pauling) - Melting Point: 594.22 K - Boiling Point: 1040 K - Density (STP): 8.65 g/cm³ - Discovered: 1817 ## Element page: https://periodic-table-of-elements.top/elements/cadmium --- # Indium (In) — Atomic Number 49 URL: https://periodic-table-of-elements.top/elements/indium ## Quick Facts - Atomic Number: 49 - Atomic Mass: 114.818 u - Symbol: In - Category: post-transition metal - Group: 13, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p1 - Electronegativity: 1.78 (Pauling) - Melting Point: 429.75 K - Boiling Point: 2345 K - Density (STP): 7.31 g/cm³ - Discovered: 1863 ## Element page: https://periodic-table-of-elements.top/elements/indium --- # Tin (Sn) — Atomic Number 50 URL: https://periodic-table-of-elements.top/elements/tin ## Quick Facts - Atomic Number: 50 - Atomic Mass: 118.710 u - Symbol: Sn - Category: post-transition metal - Group: 14, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p2 - Electronegativity: 1.96 (Pauling) - Melting Point: 505.08 K - Boiling Point: 2875 K - Density (STP): 7.31 g/cm³ - Discovered: -2999 ## Element page: https://periodic-table-of-elements.top/elements/tin --- # Antimony (Sb) — Atomic Number 51 URL: https://periodic-table-of-elements.top/elements/antimony ## Quick Facts - Atomic Number: 51 - Atomic Mass: 121.760 u - Symbol: Sb - Category: metalloid - Group: 15, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p3 - Electronegativity: 2.05 (Pauling) - Melting Point: 903.78 K - Boiling Point: 1860 K - Density (STP): 6.697 g/cm³ - Discovered: -2999 ## Element page: https://periodic-table-of-elements.top/elements/antimony --- # Tellurium (Te) — Atomic Number 52 URL: https://periodic-table-of-elements.top/elements/tellurium ## Quick Facts - Atomic Number: 52 - Atomic Mass: 127.60 u - Symbol: Te - Category: metalloid - Group: 16, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p4 - Electronegativity: 2.1 (Pauling) - Melting Point: 722.66 K - Boiling Point: 1261 K - Density (STP): 6.24 g/cm³ - Discovered: 1783 ## Element page: https://periodic-table-of-elements.top/elements/tellurium --- # Iodine (I) — Atomic Number 53 URL: https://periodic-table-of-elements.top/elements/iodine ## Quick Facts - Atomic Number: 53 - Atomic Mass: 126.90447 u - Symbol: I - Category: reactive nonmetal - Group: 17, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p5 - Electronegativity: 2.66 (Pauling) - Melting Point: 386.85 K - Boiling Point: 457.4 K - Density (STP): 4.94 g/cm³ - Discovered: 1811 ## Element page: https://periodic-table-of-elements.top/elements/iodine --- # Xenon (Xe) — Atomic Number 54 URL: https://periodic-table-of-elements.top/elements/xenon ## Quick Facts - Atomic Number: 54 - Atomic Mass: 131.293 u - Symbol: Xe - Category: noble gas - Group: 18, Period: 5 - Block: p - Electron Configuration: [Kr] 5s2 4d10 5p6 - Electronegativity: 2.6 (Pauling) - Melting Point: 161.3 K - Boiling Point: 165.1 K - Density (STP): 0.005900000000000001 g/cm³ - Discovered: 1898 ## Element page: https://periodic-table-of-elements.top/elements/xenon --- # Cesium (Cs) — Atomic Number 55 URL: https://periodic-table-of-elements.top/elements/cesium ## Quick Facts - Atomic Number: 55 - Atomic Mass: 132.90545196 u - Symbol: Cs - Category: alkali metal - Group: 1, Period: 6 - Block: s - Electron Configuration: [Xe] 6s1 - Electronegativity: 0.79 (Pauling) - Melting Point: 301.59 K - Boiling Point: 944 K - Density (STP): 1.879 g/cm³ - Discovered: 1860 ## Element page: https://periodic-table-of-elements.top/elements/cesium --- # Barium (Ba) — Atomic Number 56 URL: https://periodic-table-of-elements.top/elements/barium ## Quick Facts - Atomic Number: 56 - Atomic Mass: 137.327 u - Symbol: Ba - Category: alkaline earth metal - Group: 2, Period: 6 - Block: s - Electron Configuration: [Xe] 6s2 - Electronegativity: 0.89 (Pauling) - Melting Point: 1000 K - Boiling Point: 2143 K - Density (STP): 3.51 g/cm³ - Discovered: 1808 ## Element page: https://periodic-table-of-elements.top/elements/barium --- # Lanthanum (La) — Atomic Number 57 URL: https://periodic-table-of-elements.top/elements/lanthanum ## Quick Facts - Atomic Number: 57 - Atomic Mass: 138.90547 u - Symbol: La - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 5d1 - Electronegativity: 1.1 (Pauling) - Melting Point: 1193 K - Boiling Point: 3737 K - Density (STP): 6.146 g/cm³ - Discovered: 1839 ## Element page: https://periodic-table-of-elements.top/elements/lanthanum --- # Cerium (Ce) — Atomic Number 58 URL: https://periodic-table-of-elements.top/elements/cerium ## Quick Facts - Atomic Number: 58 - Atomic Mass: 140.116 u - Symbol: Ce - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f1 5d1 - Electronegativity: 1.12 (Pauling) - Melting Point: 1071 K - Boiling Point: 3633 K - Density (STP): 6.689 g/cm³ - Discovered: 1803 ## Element page: https://periodic-table-of-elements.top/elements/cerium --- # Praseodymium (Pr) — Atomic Number 59 URL: https://periodic-table-of-elements.top/elements/praseodymium ## Quick Facts - Atomic Number: 59 - Atomic Mass: 140.90766 u - Symbol: Pr - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f3 - Electronegativity: 1.13 (Pauling) - Melting Point: 1204 K - Boiling Point: 3563 K - Density (STP): 6.64 g/cm³ - Discovered: 1885 ## Element page: https://periodic-table-of-elements.top/elements/praseodymium --- # Neodymium (Nd) — Atomic Number 60 URL: https://periodic-table-of-elements.top/elements/neodymium ## Quick Facts - Atomic Number: 60 - Atomic Mass: 144.242 u - Symbol: Nd - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f4 - Electronegativity: 1.14 (Pauling) - Melting Point: 1294 K - Boiling Point: 3373 K - Density (STP): 7.01 g/cm³ - Discovered: 1885 ## Element page: https://periodic-table-of-elements.top/elements/neodymium --- # Promethium (Pm) — Atomic Number 61 URL: https://periodic-table-of-elements.top/elements/promethium ## Quick Facts - Atomic Number: 61 - Atomic Mass: 145 u - Symbol: Pm - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f5 - Electronegativity: unknown (Pauling) - Melting Point: 1373 K - Boiling Point: 3273 K - Density (STP): 7.264 g/cm³ - Discovered: 1945 ## Element page: https://periodic-table-of-elements.top/elements/promethium --- # Samarium (Sm) — Atomic Number 62 URL: https://periodic-table-of-elements.top/elements/samarium ## Quick Facts - Atomic Number: 62 - Atomic Mass: 150.36 u - Symbol: Sm - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f6 - Electronegativity: 1.17 (Pauling) - Melting Point: 1345 K - Boiling Point: 2076 K - Density (STP): 7.353 g/cm³ - Discovered: 1879 ## Element page: https://periodic-table-of-elements.top/elements/samarium --- # Europium (Eu) — Atomic Number 63 URL: https://periodic-table-of-elements.top/elements/europium ## Quick Facts - Atomic Number: 63 - Atomic Mass: 151.964 u - Symbol: Eu - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f7 - Electronegativity: unknown (Pauling) - Melting Point: 1095 K - Boiling Point: 1800 K - Density (STP): 5.244 g/cm³ - Discovered: 1901 ## Element page: https://periodic-table-of-elements.top/elements/europium --- # Gadolinium (Gd) — Atomic Number 64 URL: https://periodic-table-of-elements.top/elements/gadolinium ## Quick Facts - Atomic Number: 64 - Atomic Mass: 157.25 u - Symbol: Gd - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f7 5d1 - Electronegativity: 1.2 (Pauling) - Melting Point: 1586 K - Boiling Point: 3523 K - Density (STP): 7.901 g/cm³ - Discovered: 1880 ## Element page: https://periodic-table-of-elements.top/elements/gadolinium --- # Terbium (Tb) — Atomic Number 65 URL: https://periodic-table-of-elements.top/elements/terbium ## Quick Facts - Atomic Number: 65 - Atomic Mass: 158.925354 u - Symbol: Tb - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f9 - Electronegativity: unknown (Pauling) - Melting Point: 1629 K - Boiling Point: 3503 K - Density (STP): 8.219 g/cm³ - Discovered: 1843 ## Element page: https://periodic-table-of-elements.top/elements/terbium --- # Dysprosium (Dy) — Atomic Number 66 URL: https://periodic-table-of-elements.top/elements/dysprosium ## Quick Facts - Atomic Number: 66 - Atomic Mass: 162.500 u - Symbol: Dy - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f10 - Electronegativity: 1.22 (Pauling) - Melting Point: 1685 K - Boiling Point: 2840 K - Density (STP): 8.551 g/cm³ - Discovered: 1886 ## Element page: https://periodic-table-of-elements.top/elements/dysprosium --- # Holmium (Ho) — Atomic Number 67 URL: https://periodic-table-of-elements.top/elements/holmium ## Quick Facts - Atomic Number: 67 - Atomic Mass: 164.930329 u - Symbol: Ho - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f11 - Electronegativity: 1.23 (Pauling) - Melting Point: 1747 K - Boiling Point: 2973 K - Density (STP): 8.795 g/cm³ - Discovered: 1878 ## Element page: https://periodic-table-of-elements.top/elements/holmium --- # Erbium (Er) — Atomic Number 68 URL: https://periodic-table-of-elements.top/elements/erbium ## Quick Facts - Atomic Number: 68 - Atomic Mass: 167.259 u - Symbol: Er - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f12 - Electronegativity: 1.24 (Pauling) - Melting Point: 1770 K - Boiling Point: 3141 K - Density (STP): 9.066 g/cm³ - Discovered: 1842 ## Element page: https://periodic-table-of-elements.top/elements/erbium --- # Thulium (Tm) — Atomic Number 69 URL: https://periodic-table-of-elements.top/elements/thulium ## Quick Facts - Atomic Number: 69 - Atomic Mass: 168.934219 u - Symbol: Tm - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f13 - Electronegativity: 1.25 (Pauling) - Melting Point: 1818 K - Boiling Point: 2223 K - Density (STP): 9.32 g/cm³ - Discovered: 1879 ## Element page: https://periodic-table-of-elements.top/elements/thulium --- # Ytterbium (Yb) — Atomic Number 70 URL: https://periodic-table-of-elements.top/elements/ytterbium ## Quick Facts - Atomic Number: 70 - Atomic Mass: 173.045 u - Symbol: Yb - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f14 - Electronegativity: unknown (Pauling) - Melting Point: 1092 K - Boiling Point: 1469 K - Density (STP): 6.57 g/cm³ - Discovered: 1878 ## Element page: https://periodic-table-of-elements.top/elements/ytterbium --- # Lutetium (Lu) — Atomic Number 71 URL: https://periodic-table-of-elements.top/elements/lutetium ## Quick Facts - Atomic Number: 71 - Atomic Mass: 174.9668 u - Symbol: Lu - Category: lanthanide - Group: 3, Period: 6 - Block: f - Electron Configuration: [Xe] 6s2 4f14 5d1 - Electronegativity: 1.27 (Pauling) - Melting Point: 1936 K - Boiling Point: 3675 K - Density (STP): 9.841 g/cm³ - Discovered: 1907 ## Element page: https://periodic-table-of-elements.top/elements/lutetium --- # Hafnium (Hf) — Atomic Number 72 URL: https://periodic-table-of-elements.top/elements/hafnium ## Quick Facts - Atomic Number: 72 - Atomic Mass: 178.486 u - Symbol: Hf - Category: transition metal - Group: 4, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d2 - Electronegativity: 1.3 (Pauling) - Melting Point: 2506 K - Boiling Point: 4876 K - Density (STP): 13.31 g/cm³ - Discovered: 1923 ## Element page: https://periodic-table-of-elements.top/elements/hafnium --- # Tantalum (Ta) — Atomic Number 73 URL: https://periodic-table-of-elements.top/elements/tantalum ## Quick Facts - Atomic Number: 73 - Atomic Mass: 180.94788 u - Symbol: Ta - Category: transition metal - Group: 5, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d3 - Electronegativity: 1.5 (Pauling) - Melting Point: 3290 K - Boiling Point: 5731 K - Density (STP): 16.65 g/cm³ - Discovered: 1802 ## Element page: https://periodic-table-of-elements.top/elements/tantalum --- # Tungsten (W) — Atomic Number 74 URL: https://periodic-table-of-elements.top/elements/tungsten ## Quick Facts - Atomic Number: 74 - Atomic Mass: 183.84 u - Symbol: W - Category: transition metal - Group: 6, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d4 - Electronegativity: 2.36 (Pauling) - Melting Point: 3695 K - Boiling Point: 5828 K - Density (STP): 19.25 g/cm³ - Discovered: 1783 ## Element page: https://periodic-table-of-elements.top/elements/tungsten --- # Rhenium (Re) — Atomic Number 75 URL: https://periodic-table-of-elements.top/elements/rhenium ## Quick Facts - Atomic Number: 75 - Atomic Mass: 186.207 u - Symbol: Re - Category: transition metal - Group: 7, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d5 - Electronegativity: 1.9 (Pauling) - Melting Point: 3459 K - Boiling Point: 5869 K - Density (STP): 21.02 g/cm³ - Discovered: 1925 ## Element page: https://periodic-table-of-elements.top/elements/rhenium --- # Osmium (Os) — Atomic Number 76 URL: https://periodic-table-of-elements.top/elements/osmium ## Quick Facts - Atomic Number: 76 - Atomic Mass: 190.23 u - Symbol: Os - Category: transition metal - Group: 8, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d6 - Electronegativity: 2.2 (Pauling) - Melting Point: 3306 K - Boiling Point: 5285 K - Density (STP): 22.59 g/cm³ - Discovered: 1803 ## Element page: https://periodic-table-of-elements.top/elements/osmium --- # Iridium (Ir) — Atomic Number 77 URL: https://periodic-table-of-elements.top/elements/iridium ## Quick Facts - Atomic Number: 77 - Atomic Mass: 192.217 u - Symbol: Ir - Category: transition metal - Group: 9, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d7 - Electronegativity: 2.2 (Pauling) - Melting Point: 2739 K - Boiling Point: 4701 K - Density (STP): 22.56 g/cm³ - Discovered: 1803 ## Element page: https://periodic-table-of-elements.top/elements/iridium --- # Platinum (Pt) — Atomic Number 78 URL: https://periodic-table-of-elements.top/elements/platinum ## Quick Facts - Atomic Number: 78 - Atomic Mass: 195.084 u - Symbol: Pt - Category: transition metal - Group: 10, Period: 6 - Block: d - Electron Configuration: [Xe] 6s1 4f14 5d9 - Electronegativity: 2.28 (Pauling) - Melting Point: 2041.4 K - Boiling Point: 4098 K - Density (STP): 21.45 g/cm³ - Discovered: 1735 ## Element page: https://periodic-table-of-elements.top/elements/platinum --- # Gold (Au) — Atomic Number 79 URL: https://periodic-table-of-elements.top/elements/gold ## Quick Facts - Atomic Number: 79 - Atomic Mass: 196.966570 u - Symbol: Au - Category: transition metal - Group: 11, Period: 6 - Block: d - Electron Configuration: [Xe] 6s1 4f14 5d10 - Electronegativity: 2.54 (Pauling) - Melting Point: 1337.33 K - Boiling Point: 3129 K - Density (STP): 19.3 g/cm³ - Discovered: -2499 ## Element page: https://periodic-table-of-elements.top/elements/gold --- # Mercury (Hg) — Atomic Number 80 URL: https://periodic-table-of-elements.top/elements/mercury ## Quick Facts - Atomic Number: 80 - Atomic Mass: 200.59 u - Symbol: Hg - Category: transition metal - Group: 12, Period: 6 - Block: d - Electron Configuration: [Xe] 6s2 4f14 5d10 - Electronegativity: 2 (Pauling) - Melting Point: 234.32 K - Boiling Point: 629.88 K - Density (STP): 13.534 g/cm³ - Discovered: -1499 ## Element page: https://periodic-table-of-elements.top/elements/mercury --- # Thallium (Tl) — Atomic Number 81 URL: https://periodic-table-of-elements.top/elements/thallium ## Quick Facts - Atomic Number: 81 - Atomic Mass: 204.38 u - Symbol: Tl - Category: post-transition metal - Group: 13, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p1 - Electronegativity: 1.62 (Pauling) - Melting Point: 577 K - Boiling Point: 1746 K - Density (STP): 11.85 g/cm³ - Discovered: 1861 ## Element page: https://periodic-table-of-elements.top/elements/thallium --- # Lead (Pb) — Atomic Number 82 URL: https://periodic-table-of-elements.top/elements/lead ## Quick Facts - Atomic Number: 82 - Atomic Mass: 207.2 u - Symbol: Pb - Category: post-transition metal - Group: 14, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p2 - Electronegativity: 2.33 (Pauling) - Melting Point: 600.61 K - Boiling Point: 2022 K - Density (STP): 11.34 g/cm³ - Discovered: -3999 ## Element page: https://periodic-table-of-elements.top/elements/lead --- # Bismuth (Bi) — Atomic Number 83 URL: https://periodic-table-of-elements.top/elements/bismuth ## Quick Facts - Atomic Number: 83 - Atomic Mass: 208.98040 u - Symbol: Bi - Category: post-transition metal - Group: 15, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p3 - Electronegativity: 2.02 (Pauling) - Melting Point: 544.4 K - Boiling Point: 1837 K - Density (STP): 9.78 g/cm³ - Discovered: 1400 ## Element page: https://periodic-table-of-elements.top/elements/bismuth --- # Polonium (Po) — Atomic Number 84 URL: https://periodic-table-of-elements.top/elements/polonium ## Quick Facts - Atomic Number: 84 - Atomic Mass: 209 u - Symbol: Po - Category: post-transition metal - Group: 16, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p4 - Electronegativity: 2 (Pauling) - Melting Point: 528 K - Boiling Point: 1235 K - Density (STP): 9.196 g/cm³ - Discovered: 1898 ## Element page: https://periodic-table-of-elements.top/elements/polonium --- # Astatine (At) — Atomic Number 85 URL: https://periodic-table-of-elements.top/elements/astatine ## Quick Facts - Atomic Number: 85 - Atomic Mass: 210 u - Symbol: At - Category: metalloid - Group: 17, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p5 - Electronegativity: 2.2 (Pauling) - Melting Point: 575 K - Boiling Point: 623 K - Density (STP): unknown g/cm³ - Discovered: 1940 ## Element page: https://periodic-table-of-elements.top/elements/astatine --- # Radon (Rn) — Atomic Number 86 URL: https://periodic-table-of-elements.top/elements/radon ## Quick Facts - Atomic Number: 86 - Atomic Mass: 222 u - Symbol: Rn - Category: noble gas - Group: 18, Period: 6 - Block: p - Electron Configuration: [Xe] 6s2 4f14 5d10 6p6 - Electronegativity: unknown (Pauling) - Melting Point: 202 K - Boiling Point: 211.3 K - Density (STP): 0.00973 g/cm³ - Discovered: 1900 ## Element page: https://periodic-table-of-elements.top/elements/radon --- # Francium (Fr) — Atomic Number 87 URL: https://periodic-table-of-elements.top/elements/francium ## Quick Facts - Atomic Number: 87 - Atomic Mass: 223 u - Symbol: Fr - Category: alkali metal - Group: 1, Period: 7 - Block: s - Electron Configuration: [Rn] 7s1 - Electronegativity: 0.7 (Pauling) - Melting Point: 294 K - Boiling Point: 923 K - Density (STP): unknown g/cm³ - Discovered: 1939 ## Element page: https://periodic-table-of-elements.top/elements/francium --- # Radium (Ra) — Atomic Number 88 URL: https://periodic-table-of-elements.top/elements/radium ## Quick Facts - Atomic Number: 88 - Atomic Mass: 226 u - Symbol: Ra - Category: alkaline earth metal - Group: 2, Period: 7 - Block: s - Electron Configuration: [Rn] 7s2 - Electronegativity: 0.9 (Pauling) - Melting Point: 973 K - Boiling Point: 2010 K - Density (STP): 5 g/cm³ - Discovered: 1898 ## Element page: https://periodic-table-of-elements.top/elements/radium --- # Actinium (Ac) — Atomic Number 89 URL: https://periodic-table-of-elements.top/elements/actinium ## Quick Facts - Atomic Number: 89 - Atomic Mass: 227 u - Symbol: Ac - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 6d1 - Electronegativity: 1.1 (Pauling) - Melting Point: 1323 K - Boiling Point: 3473 K - Density (STP): 10.07 g/cm³ - Discovered: 1899 ## Element page: https://periodic-table-of-elements.top/elements/actinium --- # Thorium (Th) — Atomic Number 90 URL: https://periodic-table-of-elements.top/elements/thorium ## Quick Facts - Atomic Number: 90 - Atomic Mass: 232.0377 u - Symbol: Th - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 6d2 - Electronegativity: 1.3 (Pauling) - Melting Point: 2023 K - Boiling Point: 5093 K - Density (STP): 11.724 g/cm³ - Discovered: 1829 ## Element page: https://periodic-table-of-elements.top/elements/thorium --- # Protactinium (Pa) — Atomic Number 91 URL: https://periodic-table-of-elements.top/elements/protactinium ## Quick Facts - Atomic Number: 91 - Atomic Mass: 231.03588 u - Symbol: Pa - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f2 6d1 - Electronegativity: 1.5 (Pauling) - Melting Point: 1845 K - Boiling Point: 4273 K - Density (STP): 15.37 g/cm³ - Discovered: 1913 ## Element page: https://periodic-table-of-elements.top/elements/protactinium --- # Uranium (U) — Atomic Number 92 URL: https://periodic-table-of-elements.top/elements/uranium ## Quick Facts - Atomic Number: 92 - Atomic Mass: 238.02891 u - Symbol: U - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f3 6d1 - Electronegativity: 1.38 (Pauling) - Melting Point: 1408 K - Boiling Point: 4200 K - Density (STP): 19.05 g/cm³ - Discovered: 1789 ## Element page: https://periodic-table-of-elements.top/elements/uranium --- # Neptunium (Np) — Atomic Number 93 URL: https://periodic-table-of-elements.top/elements/neptunium ## Quick Facts - Atomic Number: 93 - Atomic Mass: 237 u - Symbol: Np - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f4 6d1 - Electronegativity: 1.36 (Pauling) - Melting Point: 917 K - Boiling Point: 4273 K - Density (STP): 20.45 g/cm³ - Discovered: 1940 ## Element page: https://periodic-table-of-elements.top/elements/neptunium --- # Plutonium (Pu) — Atomic Number 94 URL: https://periodic-table-of-elements.top/elements/plutonium ## Quick Facts - Atomic Number: 94 - Atomic Mass: 244 u - Symbol: Pu - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f6 - Electronegativity: 1.28 (Pauling) - Melting Point: 913 K - Boiling Point: 3503 K - Density (STP): 19.816 g/cm³ - Discovered: 1940 ## Element page: https://periodic-table-of-elements.top/elements/plutonium --- # Americium (Am) — Atomic Number 95 URL: https://periodic-table-of-elements.top/elements/americium ## Quick Facts - Atomic Number: 95 - Atomic Mass: 243 u - Symbol: Am - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f7 - Electronegativity: 1.3 (Pauling) - Melting Point: 1449 K - Boiling Point: 2284 K - Density (STP): 13.67 g/cm³ - Discovered: 1944 ## Element page: https://periodic-table-of-elements.top/elements/americium --- # Curium (Cm) — Atomic Number 96 URL: https://periodic-table-of-elements.top/elements/curium ## Quick Facts - Atomic Number: 96 - Atomic Mass: 247 u - Symbol: Cm - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f7 6d1 - Electronegativity: 1.3 (Pauling) - Melting Point: 1618 K - Boiling Point: 3383 K - Density (STP): 13.51 g/cm³ - Discovered: 1944 ## Element page: https://periodic-table-of-elements.top/elements/curium --- # Berkelium (Bk) — Atomic Number 97 URL: https://periodic-table-of-elements.top/elements/berkelium ## Quick Facts - Atomic Number: 97 - Atomic Mass: 247 u - Symbol: Bk - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f9 - Electronegativity: 1.3 (Pauling) - Melting Point: 1323 K - Boiling Point: unknown K - Density (STP): 14.78 g/cm³ - Discovered: 1949 ## Element page: https://periodic-table-of-elements.top/elements/berkelium --- # Californium (Cf) — Atomic Number 98 URL: https://periodic-table-of-elements.top/elements/californium ## Quick Facts - Atomic Number: 98 - Atomic Mass: 251 u - Symbol: Cf - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f10 - Electronegativity: 1.3 (Pauling) - Melting Point: 1173 K - Boiling Point: unknown K - Density (STP): 15.1 g/cm³ - Discovered: 1950 ## Element page: https://periodic-table-of-elements.top/elements/californium --- # Einsteinium (Es) — Atomic Number 99 URL: https://periodic-table-of-elements.top/elements/einsteinium ## Quick Facts - Atomic Number: 99 - Atomic Mass: 252 u - Symbol: Es - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f11 - Electronegativity: 1.3 (Pauling) - Melting Point: 1133 K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1952 ## Element page: https://periodic-table-of-elements.top/elements/einsteinium --- # Fermium (Fm) — Atomic Number 100 URL: https://periodic-table-of-elements.top/elements/fermium ## Quick Facts - Atomic Number: 100 - Atomic Mass: 257 u - Symbol: Fm - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f12 - Electronegativity: 1.3 (Pauling) - Melting Point: 1800 K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1952 ## Element page: https://periodic-table-of-elements.top/elements/fermium --- # Mendelevium (Md) — Atomic Number 101 URL: https://periodic-table-of-elements.top/elements/mendelevium ## Quick Facts - Atomic Number: 101 - Atomic Mass: 258 u - Symbol: Md - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f13 - Electronegativity: 1.3 (Pauling) - Melting Point: 1100 K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1955 ## Element page: https://periodic-table-of-elements.top/elements/mendelevium --- # Nobelium (No) — Atomic Number 102 URL: https://periodic-table-of-elements.top/elements/nobelium ## Quick Facts - Atomic Number: 102 - Atomic Mass: 259 u - Symbol: No - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f14 - Electronegativity: 1.3 (Pauling) - Melting Point: 1100 K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1958 ## Element page: https://periodic-table-of-elements.top/elements/nobelium --- # Lawrencium (Lr) — Atomic Number 103 URL: https://periodic-table-of-elements.top/elements/lawrencium ## Quick Facts - Atomic Number: 103 - Atomic Mass: 266 u - Symbol: Lr - Category: actinide - Group: 3, Period: 7 - Block: f - Electron Configuration: [Rn] 7s2 5f14 7p1 - Electronegativity: unknown (Pauling) - Melting Point: 1900 K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1961 ## Element page: https://periodic-table-of-elements.top/elements/lawrencium --- # Rutherfordium (Rf) — Atomic Number 104 URL: https://periodic-table-of-elements.top/elements/rutherfordium ## Quick Facts - Atomic Number: 104 - Atomic Mass: 267 u - Symbol: Rf - Category: transition metal - Group: 4, Period: 7 - Block: d - Electron Configuration: [Rn] 7s2 5f14 6d2 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1964 ## Element page: https://periodic-table-of-elements.top/elements/rutherfordium --- # Dubnium (Db) — Atomic Number 105 URL: https://periodic-table-of-elements.top/elements/dubnium ## Quick Facts - Atomic Number: 105 - Atomic Mass: 268 u - Symbol: Db - Category: transition metal - Group: 5, Period: 7 - Block: d - Electron Configuration: [Rn] 7s2 5f14 6d3 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1967 ## Element page: https://periodic-table-of-elements.top/elements/dubnium --- # Seaborgium (Sg) — Atomic Number 106 URL: https://periodic-table-of-elements.top/elements/seaborgium ## Quick Facts - Atomic Number: 106 - Atomic Mass: 269 u - Symbol: Sg - Category: transition metal - Group: 6, Period: 7 - Block: d - Electron Configuration: [Rn] 7s2 5f14 6d4 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1974 ## Element page: https://periodic-table-of-elements.top/elements/seaborgium --- # Bohrium (Bh) — Atomic Number 107 URL: https://periodic-table-of-elements.top/elements/bohrium ## Quick Facts - Atomic Number: 107 - Atomic Mass: 270 u - Symbol: Bh - Category: transition metal - Group: 7, Period: 7 - Block: d - Electron Configuration: [Rn] 7s2 5f14 6d5 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1981 ## Element page: https://periodic-table-of-elements.top/elements/bohrium --- # Hassium (Hs) — Atomic Number 108 URL: https://periodic-table-of-elements.top/elements/hassium ## Quick Facts - Atomic Number: 108 - Atomic Mass: 270 u - Symbol: Hs - Category: transition metal - Group: 8, Period: 7 - Block: d - Electron Configuration: [Rn] 7s2 5f14 6d6 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1984 ## Element page: https://periodic-table-of-elements.top/elements/hassium --- # Meitnerium (Mt) — Atomic Number 109 URL: https://periodic-table-of-elements.top/elements/meitnerium ## Quick Facts - Atomic Number: 109 - Atomic Mass: 278 u - Symbol: Mt - Category: unknown - Group: 9, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d7 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1982 ## Element page: https://periodic-table-of-elements.top/elements/meitnerium --- # Darmstadtium (Ds) — Atomic Number 110 URL: https://periodic-table-of-elements.top/elements/darmstadtium ## Quick Facts - Atomic Number: 110 - Atomic Mass: 281 u - Symbol: Ds - Category: unknown - Group: 10, Period: 7 - Block: p - Electron Configuration: [Rn] 7s1 5f14 6d9 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1994 ## Element page: https://periodic-table-of-elements.top/elements/darmstadtium --- # Roentgenium (Rg) — Atomic Number 111 URL: https://periodic-table-of-elements.top/elements/roentgenium ## Quick Facts - Atomic Number: 111 - Atomic Mass: 282 u - Symbol: Rg - Category: unknown - Group: 11, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d9 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1994 ## Element page: https://periodic-table-of-elements.top/elements/roentgenium --- # Copernicium (Cn) — Atomic Number 112 URL: https://periodic-table-of-elements.top/elements/copernicium ## Quick Facts - Atomic Number: 112 - Atomic Mass: 285 u - Symbol: Cn - Category: unknown - Group: 12, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1996 ## Element page: https://periodic-table-of-elements.top/elements/copernicium --- # Nihonium (Nh) — Atomic Number 113 URL: https://periodic-table-of-elements.top/elements/nihonium ## Quick Facts - Atomic Number: 113 - Atomic Mass: 286 u - Symbol: Nh - Category: unknown - Group: 13, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p1 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 2004 ## Element page: https://periodic-table-of-elements.top/elements/nihonium --- # Flerovium (Fl) — Atomic Number 114 URL: https://periodic-table-of-elements.top/elements/flerovium ## Quick Facts - Atomic Number: 114 - Atomic Mass: 289 u - Symbol: Fl - Category: unknown - Group: 14, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p2 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 1998 ## Element page: https://periodic-table-of-elements.top/elements/flerovium --- # Moscovium (Mc) — Atomic Number 115 URL: https://periodic-table-of-elements.top/elements/moscovium ## Quick Facts - Atomic Number: 115 - Atomic Mass: 290 u - Symbol: Mc - Category: unknown - Group: 15, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p3 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 2004 ## Element page: https://periodic-table-of-elements.top/elements/moscovium --- # Livermorium (Lv) — Atomic Number 116 URL: https://periodic-table-of-elements.top/elements/livermorium ## Quick Facts - Atomic Number: 116 - Atomic Mass: 293 u - Symbol: Lv - Category: unknown - Group: 16, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p4 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 2000 ## Element page: https://periodic-table-of-elements.top/elements/livermorium --- # Tennessine (Ts) — Atomic Number 117 URL: https://periodic-table-of-elements.top/elements/tennessine ## Quick Facts - Atomic Number: 117 - Atomic Mass: 294 u - Symbol: Ts - Category: unknown - Group: 17, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p5 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 2010 ## Element page: https://periodic-table-of-elements.top/elements/tennessine --- # Oganesson (Og) — Atomic Number 118 URL: https://periodic-table-of-elements.top/elements/oganesson ## Quick Facts - Atomic Number: 118 - Atomic Mass: 294 u - Symbol: Og - Category: unknown - Group: 18, Period: 7 - Block: p - Electron Configuration: [Rn] 7s2 5f14 6d10 7p6 - Electronegativity: unknown (Pauling) - Melting Point: unknown K - Boiling Point: unknown K - Density (STP): unknown g/cm³ - Discovered: 2006 ## Element page: https://periodic-table-of-elements.top/elements/oganesson --- ## Sumber data - IUPAC/CIAAW: standard atomic weights - PubChem (NIH): element profiles, isotopes, compounds - NIST Atomic Spectra Database - Bowserinator/Periodic-Table-JSON (open dataset, MIT) - v1 migration snapshot (properties-951c835.json) Conflict resolution priority: IUPAC > PubChem > NIST > open dataset. Last reviewed: 2026-07-16