相对原子质量表
- 本相对原子质量表按原子序数排。
- 本表数据源自2022年IUPAC元素周期表(IUPAC 2022 standard atomic weights)(页面存档备份,存于互联网档案馆),单同位素质量源自2021年版各元素标准原子质量(IUPAC技术报告) (页面存档备份,存于互联网档案馆),以碳十二=12为标准。
- 本表[]内的原子质量为放射元素(除铋、钍、镤、铀,虽然这些元素没有稳定同位素,但有天然放射同位素铋209,钍232,镤231,铀235、238,故仍可给予标准原子量)最长半衰期的同位素质量数。
原子序 | 元素名 | 符号 | 标准原子质量 | 不确定度 | 单同位素质量 |
---|---|---|---|---|---|
1 | 氢 | H | 1.0080 | ±0.0002 | |
2 | 氦 | He | 4.0026 | ±0.0001 | |
3 | 锂 | Li | 6.94 | ±0.06 | |
4 | 铍 | Be | 9.0122 | ±0.0001 | 9.0121 831±0.0000 005 |
5 | 硼 | B | 10.81 | ±0.02 | |
6 | 碳 | C | 12.011 | ±0.002 | |
7 | 氮 | N | 14.007 | ±0.001 | |
8 | 氧 | O | 15.999 | ±0.001 | |
9 | 氟 | F | 18.998 | ±0.001 | |
10 | 氖 | Ne | 20.180 | ±0.001 | |
11 | 钠 | Na | 22.990 | ±0.001 | |
12 | 镁 | Mg | 24.305 | ±0.002 | |
13 | 铝 | Al | 26.982 | ±0.001 | |
14 | 硅 | Si | 28.0855 | ±0.001 | |
15 | 磷 | P | 30.974 | ±0.001 | |
16 | 硫 | S | 32.06 | ±0.02 | |
17 | 氯 | Cl | 35.45 | ±0.01 | |
18 | 氩 | Ar | 39.95 | ±0.16 | |
19 | 钾 | K | 39.098 | ±0.001 | |
20 | 钙 | Ca | 40.078 | ±0.004 | |
21 | 钪 | Sc | 44.956 | ±0.0001 | |
22 | 钛 | Ti | 47.867 | ±0.001 | |
23 | 钒 | V | 50.942 | ±0.001 | |
24 | 铬 | Cr | 51.996 | ±0.001 | |
25 | 锰 | Mn | 54.938 | ±0.001 | |
26 | 铁 | Fe | 55.845 | ±0.002 | |
27 | 钴 | Co | 58.933 | ±0.001 | |
28 | 镍 | Ni | 58.693 | ±0.001 | |
29 | 铜 | Cu | 63.546 | ±0.003 | |
30 | 锌 | Zn | 65.38 | ±0.02 | |
31 | 镓 | Ga | 69.723 | ±0.001 | |
32 | 锗 | Ge | 72.630 | ±0.008 | |
33 | 砷 | As | 74.922 | ±0.001 | |
34 | 硒 | Se | 78.971 | ±0.008 | |
35 | 溴 | Br | 79.904 | ±0.003 | |
36 | 氪 | Kr | 83.798 | ±0.002 | |
37 | 铷 | Rb | 85.468 | ±0.001 | |
38 | 锶 | Sr | 87.62 | ±0.01 | |
39 | 钇 | Y | 88.906 | ±0.001 | |
40 | 锆 | Zr | 91.224 | ±0.002 | |
41 | 铌 | Nb | 92.906 | ±0.001 | |
42 | 钼 | Mo | 95.95 | ±0.01 | |
43 | 锝 | Tc | [97] | ||
44 | 钌 | Ru | 101.07 | ±0.02 | |
45 | 铑 | Rh | 102.91 | ±0.01 | |
46 | 钯 | Pd | 106.42 | ±0.01 | |
47 | 银 | Ag | 107.87 | ±0.01 | |
48 | 镉 | Cd | 112.41 | ±0.01 | |
49 | 铟 | In | 114.82 | ±0.01 | |
50 | 锡 | Sn | 118.71 | ±0.01 | |
51 | 锑 | Sb | 121.76 | ±0.01 | |
52 | 碲 | Te | 127.60 | ±0.03 | |
53 | 碘 | I | 126.90 | ±0.01 | |
54 | 氙 | Xe | 131.29 | ±0.01 | |
55 | 铯 | Cs | 132.91 | ±0.01 | |
56 | 钡 | Ba | 137.33 | ±0.01 | |
57 | 镧 | La | 138.91 | ±0.01 | |
58 | 铈 | Ce | 140.12 | ±0.01 | |
59 | 镨 | Pr | 140.91 | ±0.01 | |
60 | 钕 | Nd | 144.24 | ±0.01 | |
61 | 钷 | Pm | [145] | ||
62 | 钐 | Sm | 150.36 | ±0.02 | |
63 | 铕 | Eu | 151.96 | ±0.01 | |
64 | 钆 | Gd | 157.25 | ±0.03 | |
65 | 铽 | Tb | 158.93 | ±0.01 | Tb159,稳定,158.925 354±0.000 007 |
66 | 镝 | Dy | 162.50 | ±0.01 | |
67 | 钬 | Ho | 164.93 | ±0.01 | |
68 | 铒 | Er | 167.26 | ±0.01 | |
69 | 铥 | Tm | 168.93 | ±0.01 | |
70 | 镱 | Yb | 173.05 | ±0.02 | |
71 | 镥 | Lu | 174.97 | ±0.01 | |
72 | 铪 | Hf | 178.49 | ±0.01 | |
73 | 钽 | Ta | 180.95 | ±0.01 | |
74 | 钨 | W | 183.84 | ±0.01 | |
75 | 铼 | Re | 186.21 | ±0.01 | |
76 | 锇 | Os | 190.23 | ±0.03 | |
77 | 铱 | Ir | 192.22 | ±0.01 | |
78 | 铂 | Pt | 195.08 | ±0.02 | |
79 | 金 | Au | 196.97 | ±0.01 | |
80 | 汞 | Hg | 200.59 | ±0.01 | |
81 | 铊 | Tl | 204.38 | ±0.01 | |
82 | 铅 | Pb | 207.2 | ±1.1 | |
83 | 铋 | Bi | 208.98 | ±0.01 | |
84 | 钋 | Po | [209] | ||
85 | 砹 | At | [210] | ||
86 | 氡 | Rn | [222] | ||
87 | 钫 | Fr | [223] | ||
88 | 镭 | Ra | [226] | ||
89 | 锕 | Ac | [227] | ||
90 | 钍 | Th | 232.04 | ±0.01 | |
91 | 镤 | Pa | 231.04 | ±0.01 | |
92 | 铀 | U | 238.03 | ±0.01 | |
93 | 镎 | Np | [237] | ||
94 | 钚 | Pu | [244] | ||
95 | 镅 | Am | [243] | ||
96 | 锔 | Cm | [247] | ||
97 | 锫 | Bk | [247] | ||
98 | 锎 | Cf | [251] | ||
99 | 锿 | Es | [252] | ||
100 | 镄 | Fm | [257] | ||
101 | 钔 | Md | [258] | ||
102 | 锘 | No | [259] | ||
103 | 铹 | Lr | [262] | ||
104 | 𬬻 | Rf | [267] | ||
105 | 𬭊 | Db | [268] | ||
106 | 𬭳 | Sg | [269] | ||
107 | 𬭛 | Bh | [270] | ||
108 | 𬭶 | Hs | [269] | ||
109 | 鿏 | Mt | [277] | ||
110 | 𫟼 | Ds | [281] | ||
111 | 𬬭 | Rg | [282] | ||
112 | 鿔 | Cn | [285] | ||
113 | 鿭 | Nh | [286] | ||
114 | 𫓧 | Fl | [290] | ||
115 | 镆 | Mc | [290] | ||
116 | 𫟷 | Lv | [293] | ||
117 | 鿬 | Ts | [294] | ||
118 | 鿫 | Og | [294] |