Atomic mass/Table
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| Group → | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ↓ Period | ||||||||||||||||||||
| 1 | H 1.008 |
He 4.003 |
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| 2 | Li 6.941 |
Be 9.012 |
B 10.81 |
C 12.01 |
N 14.01 |
O 16.00 |
F 19.00 |
Ne 20.18 |
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| 3 | Na 22.99 |
Mg 24.31 |
Al 26.98 |
Si 28.09 |
P 30.97 |
S 32.07 |
Cl 35.45 |
Ar 39.95 |
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| 4 | K 39.10 |
Ca 40.08 |
Sc 44.96 |
Ti 47.87 |
V 50.94 |
Cr 52.00 |
Mn 54.94 |
Fe 55.84 |
Co 58.93 |
Ni 58.69 |
Cu 63.55 |
Zn 65.39 |
Ga 69.72 |
Ge 72.61 |
As 74.92 |
Se 78.96 |
Br 79.90 |
Kr 83.80 |
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| 5 | Rb 85.47 |
Sr 87.62 |
Y 88.91 |
Zr 91.22 |
Nb 92.91 |
Mo 95.94 |
Tc [99] |
Ru 101.07 |
Rh 102.91 |
Pd 106.42 |
Ag 107.87 |
Cd 112.41 |
In 114.82 |
Sn 118.71 |
Sb 121.76 |
Te 127.60 |
I 126.90 |
Xe 131.29 |
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| 6 | Cs 132.91 |
Ba 137.33 |
* |
Hf 178.49 |
Ta 180.95 |
W 183.84 |
Re 186.21 |
Os 190.23 |
Ir 192.22 |
Pt 195.08 |
Au 196.97 |
Hg 200.59 |
Tl 204.38 |
Pb 207.2 |
Bi 208.98 |
Po [209] |
At [210] |
Rn [222] |
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| 7 | Fr [223] |
Ra [226] |
** |
Rf [263] |
Db [262] |
Sg [266] |
Bh [264] |
Hs [269] |
Mt [268] |
Ds [272] |
Rg [272] |
Uub [277] |
Uut [284] |
Uuq [289] |
Uup [288] |
Uuh [292] |
Uus [291]‡ |
Uuo [293]‡ |
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| * Lanthanides | La 138.91 |
Ce 140.12 |
Pr 140.91 |
Nd 144.24 |
Pm [145] |
Sm 150.36 |
Eu 151.96 |
Gd 157.25 |
Tb 158.93 |
Dy 162.50 |
Ho 164.93 |
Er 167.26 |
Tm 168.93 |
Yb 173.04 |
Lu 174.97 |
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| ** Actinides | Ac [227] |
Th 232.04 |
Pa 231.04 |
U 238.03 |
Np [237] |
Pu [244] |
Am [243] |
Cm [247] |
Bk [247] |
Cf [251] |
Es [252] |
Fm [257] |
Md [258] |
No [259] |
Lr [262] |
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