元素週期表

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    14
    15Pnictogens
    16Chalcogens
    17鹵素
    18
    Color
    Scale
    s
    區
    p
    區
    d
    區
    f
    區
    1s
    2s
    3s
    4s
    5s
    6s
    7s
    2p
    3p
    4p
    5p
    6p
    7p
    3d
    4d
    5d
    6d
    4f
    5f
    β⁻
    β衰變
     
    穩定
    序號 符號 名称 重量
    1
  1. 1 H 氫 1.008
  2. 2 He 氦 4.0026
    3. 2
  3. 3 Li 鋰 6.94
  4. 4 Be 鈹 9.0122
  5. 5 B 硼 10.81
  6. 6 C 碳 12.011
  7. 7 N 氮 14.007
  8. 8 O 氧 15.999
  9. 9 F 氟 18.998
  10. 10 Ne 氖 20.180
    11. 3
  11. 11 Na 鈉 22.990
  12. 12 Mg 鎂 24.305
  13. 13 Al 鋁 26.982
  14. 14 Si 矽 28.085
  15. 15 P 磷 30.974
  16. 16 S 硫 32.06
  17. 17 Cl 氯 35.45
  18. 18 Ar 氬 39.948
    19. 4
  19. 19 K 鉀 39.098
  20. 20 Ca 鈣 40.078
  21. 21 Sc 鈧 44.956
  22. 22 Ti 鈦 47.867
  23. 23 V 釩 50.942
  24. 24 Cr 鉻 51.996
  25. 25 Mn 錳 54.938
  26. 26 Fe 鐵 55.845
  27. 27 Co 鈷 58.933
  28. 28 Ni 鎳 58.693
  29. 29 Cu 銅 63.546
  30. 30 Zn 鋅 65.38
  31. 31 Ga 鎵 69.723
  32. 32 Ge 鍺 72.630
  33. 33 As 砷 74.922
  34. 34 Se 硒 78.971
  35. 35 Br 溴 79.904
  36. 36 Kr 氪 83.798
    37. 5
  37. 37 Rb 銣 85.468
  38. 38 Sr 鍶 87.62
  39. 39 Y 釔 88.906
  40. 40 Zr 鋯 91.224
  41. 41 Nb 鈮 92.906
  42. 42 Mo 鉬 95.95
  43. 43 Tc 鎝 (98)
  44. 44 Ru 釕 101.07
  45. 45 Rh 銠 102.91
  46. 46 Pd 鈀 106.42
  47. 47 Ag 銀 107.87
  48. 48 Cd 鎘 112.41
  49. 49 In 銦 114.82
  50. 50 Sn 錫 118.71
  51. 51 Sb 銻 121.76
  52. 52 Te 碲 127.60
  53. 53 I 碘 126.90
  54. 54 Xe 氙 131.29
    55. 6
  55. 55 Cs 銫 132.91
  56. 56 Ba 鋇 137.33
    57. 57–71
    6
  57. 57 La 鑭 138.91
  58. 58 Ce 鈰 140.12
  59. 59 Pr 鐠 140.91
  60. 60 Nd 釹 144.24
  61. 61 Pm 鉕 (145)
  62. 62 Sm 釤 150.36
  63. 63 Eu 銪 151.96
  64. 64 Gd 釓 157.25
  65. 65 Tb 鋱 158.93
  66. 66 Dy 鏑 162.50
  67. 67 Ho 鈥 164.93
  68. 68 Er 鉺 167.26
  69. 69 Tm 銩 168.93
  70. 70 Yb 鐿 173.05
  71. 71 Lu 鎦 174.97
  72. 72 Hf 鉿 178.49
  73. 73 Ta 鉭 180.95
  74. 74 W 鎢 183.84
  75. 75 Re 錸 186.21
  76. 76 Os 鋨 190.23
  77. 77 Ir 銥 192.22
  78. 78 Pt 鉑 195.08
  79. 79 Au 金 196.97
  80. 80 Hg 汞 200.59
  81. 81 Tl 鉈 204.38
  82. 82 Pb 鉛 207.2
  83. 83 Bi 鉍 208.98
  84. 84 Po 釙 (209)
  85. 85 At 砈 (210)
  86. 86 Rn 氡 (222)
    87. 7
  87. 87 Fr 钫 (223)
  88. 88 Ra 鐳 (226)
    89. 89–103
    7
  89. 89 Ac 錒 (227)
  90. 90 Th 釷 232.04
  91. 91 Pa 鏷 231.04
  92. 92 U 鈾 238.03
  93. 93 Np 錼 (237)
  94. 94 Pu 鈽 (244)
  95. 95 Am 鋂 (243)
  96. 96 Cm 鋦 (247)
  97. 97 Bk 鉳 (247)
  98. 98 Cf 鉲 (251)
  99. 99 Es 鑀 (252)
  100. 100 Fm 鐨 (257)
  101. 101 Md 鍆 (258)
  102. 102 No 鍩 (259)
  103. 103 Lr 鐒 (266)
  104. 104 Rf 鑪 (267)
  105. 105 Db 𨧀 (268)
  106. 106 Sg 𨭎 (269)
  107. 107 Bh 𨨏 (270)
  108. 108 Hs 𨭆 (277)
  109. 109 Mt 䥑 (278)
  110. 110 Ds 鐽 (281)
  111. 111 Rg 錀 (282)
  112. 112 Cn 鎶 (285)
  113. 113 Nh 鉨 (286)
  114. 114 Fl 鈇 (289)
  115. 115 Mc 鏌 (290)
  116. 116 Lv 鉝 (293)
  117. 117 Ts 鿬 (294)
  118. 118 Og 鿫 (294)
    119. 對沒有穩定同位素的元素，其同位素中半衰期最長的重量在括號中標示。