Periodesystemet for Grunnstoffer

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    15Pnictogens
    16Chalcogens
    17Halogener
    18
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    Atomic Symbol NavnVekt
    1
  1. 1 H Hydrogen1,008
  2. 2 He Helium4,0026
    3. 2
  3. 3 Li Litium6,94
  4. 4 Be Beryllium9,0122
  5. 5 B Bor10,81
  6. 6 C Karbon12,011
  7. 7 N Nitrogen14,007
  8. 8 O Oksygen15,999
  9. 9 F Fluor18,998
  10. 10 Ne Neon20,180
    11. 3
  11. 11 Na Natrium22,990
  12. 12 Mg Magnesium24,305
  13. 13 Al Aluminium26,982
  14. 14 Si Silisium28,085
  15. 15 P Fosfor30,974
  16. 16 S Svovel32,06
  17. 17 Cl Klor35,45
  18. 18 Ar Argon39,948
    19. 4
  19. 19 K Kalium39,098
  20. 20 Ca Kalsium40,078
  21. 21 Sc Scandium44,956
  22. 22 Ti Titan47,867
  23. 23 V Vanadium50,942
  24. 24 Cr Krom51,996
  25. 25 Mn Mangan54,938
  26. 26 Fe Jern55,845
  27. 27 Co Kobolt58,933
  28. 28 Ni Nikkel58,693
  29. 29 Cu Kobber63,546
  30. 30 Zn Sink65,38
  31. 31 Ga Gallium69,723
  32. 32 Ge Germanium72,630
  33. 33 As Arsen74,922
  34. 34 Se Selen78,971
  35. 35 Br Brom79,904
  36. 36 Kr Krypton83,798
    37. 5
  37. 37 Rb Rubidium85,468
  38. 38 Sr Strontium87,62
  39. 39 Y Yttrium88,906
  40. 40 Zr Zirkonium91,224
  41. 41 Nb Niob92,906
  42. 42 Mo Molybden95,95
  43. 43 Tc Technetium(98)
  44. 44 Ru Ruthenium101,07
  45. 45 Rh Rhodium102,91
  46. 46 Pd Palladium106,42
  47. 47 Ag Sølv107,87
  48. 48 Cd Kadmium112,41
  49. 49 In Indium114,82
  50. 50 Sn Tinn118,71
  51. 51 Sb Antimon121,76
  52. 52 Te Tellur127,60
  53. 53 I Jod126,90
  54. 54 Xe Xenon131,29
    55. 6
  55. 55 Cs Cesium132,91
  56. 56 Ba Barium137,33
    57. 57–71
    6
  57. 57 La Lantan138,91
  58. 58 Ce Cerium140,12
  59. 59 Pr Praseodym140,91
  60. 60 Nd Neodym144,24
  61. 61 Pm Promethium(145)
  62. 62 Sm Samarium150,36
  63. 63 Eu Europium151,96
  64. 64 Gd Gadolinium157,25
  65. 65 Tb Terbium158,93
  66. 66 Dy Dysprosium162,50
  67. 67 Ho Holmium164,93
  68. 68 Er Erbium167,26
  69. 69 Tm Thulium168,93
  70. 70 Yb Ytterbium173,05
  71. 71 Lu Lutetium174,97
  72. 72 Hf Hafnium178,49
  73. 73 Ta Tantal180,95
  74. 74 W Wolfram183,84
  75. 75 Re Rhenium186,21
  76. 76 Os Osmium190,23
  77. 77 Ir Iridium192,22
  78. 78 Pt Platina195,08
  79. 79 Au Gull196,97
  80. 80 Hg Kvikksølv200,59
  81. 81 Tl Thallium204,38
  82. 82 Pb Bly207,2
  83. 83 Bi Vismut208,98
  84. 84 Po Polonium(209)
  85. 85 At Astat(210)
  86. 86 Rn Radon(222)
    87. 7
  87. 87 Fr Francium(223)
  88. 88 Ra Radium(226)
    89. 89–103
    7
  89. 89 Ac Actinium(227)
  90. 90 Th Thorium232,04
  91. 91 Pa Protactinium231,04
  92. 92 U Uran238,03
  93. 93 Np Neptunium(237)
  94. 94 Pu Plutonium(244)
  95. 95 Am Americium(243)
  96. 96 Cm Curium(247)
  97. 97 Bk Berkelium(247)
  98. 98 Cf Californium(251)
  99. 99 Es Einsteinium(252)
  100. 100 Fm Fermium(257)
  101. 101 Md Mendelevium(258)
  102. 102 No Nobelium(259)
  103. 103 Lr Lawrencium(266)
  104. 104 Rf Rutherfordium(267)
  105. 105 Db Dubnium(268)
  106. 106 Sg Seaborgium(269)
  107. 107 Bh Bohrium(270)
  108. 108 Hs Hassium(277)
  109. 109 Mt Meitnerium(278)
  110. 110 Ds Darmstadtium(281)
  111. 111 Rg Røntgenium(282)
  112. 112 Cn Copernicium(285)
  113. 113 Nh Nihonium(286)
  114. 114 Fl Flerovium(289)
  115. 115 Mc Moscovium(290)
  116. 116 Lv Livermorium(293)
  117. 117 Ts Tenness(294)
  118. 118 Og Oganesson(294)
    119. For grunnstoffer uten stabile isotoper er massetallet for isotopen med lengst halveringstid oppgitt i parentes.