相对原子质量表
- 本相对原子质量表按照原子序数排列。
- 本表数据源自2007年IUPAC元素周期表(链接已失效)(IUPAC 2007 standard atomic weights)，以12C=12为标准。
- 本表 [ ] 内的原子质量为放射性元素（钨、铋、钍、镤、铀除外，因为虽然这些元素没有稳定同位素，但是有天然放射性同位素W-180，W-182，W-183，W-184，W-186，Bi-209，Th-232，Pa-231，U-235，U238，故标準原子量仍然可以給予）的半衰期最长的同位素质量数。
- 相对原子质量末位数的不确定度加注在其后的()内，比如8号氧元素的相对原子质量15.9994(3)是15.9994±0.0003的简写。
- 113-118号元素数据未被IUPAC确定。
| 原子序数 | 元素名称 | 元素符号 | 相对原子质量 |
|---|---|---|---|
| 1 | 氢 | H | 1.00794(7) |
| 2 | 氦 | He | 4.002602(2) |
| 3 | 锂 | Li | 6.941(2) |
| 4 | 铍 | Be | 9.0121831(3) |
| 5 | 硼 | B | 10.811(7) |
| 6 | 碳 | C | 12.0107(8) |
| 7 | 氮 | N | 14.0067(2) |
| 8 | 氧 | O | 15.9994(3) |
| 9 | 氟 | F | 18.998403163(6) |
| 10 | 氖 | Ne | 20.1797(6) |
| 11 | 钠 | Na | 22.98976928(2) |
| 12 | 镁 | Mg | 24.3050(6) |
| 13 | 铝 | Al | 26.9815385(7) |
| 14 | 硅 | Si | 28.0855(3) |
| 15 | 磷 | P | 30.973761998(5) |
| 16 | 硫 | S | 32.065(5) |
| 17 | 氯 | Cl | 35.453(2) |
| 18 | 氩 | Ar | 39.948(1) |
| 19 | 钾 | K | 39.0983(1) |
| 20 | 钙 | Ca | 40.078(4) |
| 21 | 钪 | Sc | 44.955908(5) |
| 22 | 钛 | Ti | 47.867(1) |
| 23 | 钒 | V | 50.9415(1) |
| 24 | 铬 | Cr | 51.9961(6) |
| 25 | 锰 | Mn | 54.938044(3) |
| 26 | 铁 | Fe | 55.845(2) |
| 27 | 钴 | Co | 58.933194(4) |
| 28 | 镍 | Ni | 58.6934(4) |
| 29 | 铜 | Cu | 63.546(3) |
| 30 | 锌 | Zn | 65.38(2) |
| 31 | 镓 | Ga | 69.723(1) |
| 32 | 锗 | Ge | 72.64(1) |
| 33 | 砷 | As | 74.921595(6) |
| 34 | 硒 | Se | 78.971(8) |
| 35 | 溴 | Br | 79.904(1) |
| 36 | 氪 | Kr | 83.798(2) |
| 37 | 铷 | Rb | 85.4678(3) |
| 38 | 锶 | Sr | 87.62(1) |
| 39 | 钇 | Y | 88.90584(2) |
| 40 | 锆 | Zr | 91.224(2) |
| 41 | 铌 | Nb | 92.90637(2) |
| 42 | 钼 | Mo | 95.95(1) |
| 43 | 锝 | Tc | [98.9072] |
| 44 | 钌 | Ru | 101.07(2) |
| 45 | 铑 | Rh | 102.90550(2) |
| 46 | 钯 | Pd | 106.42(1) |
| 47 | 银 | Ag | 107.8682(2) |
| 48 | 镉 | Cd | 112.414(4) |
| 49 | 铟 | In | 114.818(3) |
| 50 | 锡 | Sn | 118.710(7) |
| 51 | 锑 | Sb | 121.760(1) |
| 52 | 碲 | Te | 127.60(3) |
| 53 | 碘 | I | 126.90447(3) |
| 54 | 氙 | Xe | 131.293(6) |
| 55 | 铯 | Cs | 132.90545196(6) |
| 56 | 钡 | Ba | 137.327(7) |
| 57 | 镧 | La | 138.90547(7) |
| 58 | 铈 | Ce | 140.116(1) |
| 59 | 镨 | Pr | 140.90766(2) |
| 60 | 钕 | Nd | 144.242(3) |
| 61 | 钷 | Pm | 144.9(2) |
| 62 | 钐 | Sm | 150.36(2) |
| 63 | 铕 | Eu | 151.964(1) |
| 64 | 钆 | Gd | 157.25(3) |
| 65 | 铽 | Tb | 158.92535(2) |
| 66 | 镝 | Dy | 162.500(1) |
| 67 | 钬 | Ho | 164.93033(2) |
| 68 | 铒 | Er | 167.259(3) |
| 69 | 铥 | Tm | 168.93422(2) |
| 70 | 镱 | Yb | 173.054(5) |
| 71 | 镥 | Lu | 174.9668(1) |
| 72 | 铪 | Hf | 178.49(2) |
| 73 | 钽 | Ta | 180.94788(2) |
| 74 | 钨 | W | 183.84(1) |
| 75 | 铼 | Re | 186.207(1) |
| 76 | 锇 | Os | 190.23(3) |
| 77 | 铱 | Ir | 192.217(3) |
| 78 | 铂 | Pt | 195.084(9) |
| 79 | 金 | Au | 196.966569(5) |
| 80 | 汞 | Hg | 200.59(2) |
| 81 | 铊 | Tl | 204.3833(2) |
| 82 | 铅 | Pb | 207.2(1) |
| 83 | 铋 | Bi | 208.98040(1) |
| 84 | 钋 | Po | [208.9824] |
| 85 | 砹 | At | [209.9871] |
| 86 | 氡 | Rn | [222.0176] |
| 87 | 钫 | Fr | [223.0197] |
| 88 | 镭 | Ra | [226.0245] |
| 89 | 锕 | Ac | [227.0277] |
| 90 | 钍 | Th | 232.0377(4) |
| 91 | 镤 | Pa | 231.03588(2) |
| 92 | 铀 | U | 238.02891(3) |
| 93 | 镎 | Np | [237.0482] |
| 94 | 钚 | Pu | [239.0642] |
| 95 | 镅 | Am | [243.0614] |
| 96 | 锔 | Cm | [247.0704] |
| 97 | 锫 | Bk | [247.0703] |
| 98 | 锎 | Cf | [251.0796] |
| 99 | 锿 | Es | [252.0830] |
| 100 | 镄 | Fm | [257.0591] |
| 101 | 钔 | Md | [258.0984] |
| 102 | 锘 | No | [259.1010] |
| 103 | 铹 | Lr | [262.1097] |
| 104 | 鑪 | Rf | [267.1218] |
| 105 | 𨧀 | Db | [268.1257] |
| 106 | 𨭎 | Sg | [269.1286] |
| 107 | 𨨏 | Bh | [274.1436] |
| 108 | 𨭆 | Hs | [277.1519] |
| 109 | 䥑 | Mt | [278] |
| 110 | 鐽 | Ds | [281] |
| 111 | 錀 | Rg | [282] |
| 112 | 鎶 | Cn | [285] |
| 113 | 鉨 | Nh | [284] |
| 114 | 鈇 | Fl | [289] |
| 115 | 镆 | Mc | [288] |
| 116 | 鉝 | Lv | [292] |
| 117 | 鿬 | Ts | [294] |
| 118 | 鿫 | Og | [295] |