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Standard Atomic Weights Of Commonly Encountered
Elements in order of Symbol

Symbol Name Atomic Number Atomic Weight
Ag Silver 47 107.868
Al Aluminium 13 26.982
Ar Argon 18 39.948
As Arsenic 33 74.922
Au Gold 79 196.967
B Boron 5 10.810
Ba Barium 56 137.330
Be Beryllium 4 9.012
Bi Bismuth 83 208.980
Br Bromine 35 79.904
C Carbon 6 12.011
Ca Calcium 20 40.080
Cd Cadmium 48 112.410
Cl Chlorine 17 35.453
Co Cobalt 27 58.933
Cr Chromium 24 51.996
Cs Caesium 55 132.905
Cu Copper 29 63.546
F Fluorine 9 18.998
Fe Iron 26 55.847
Ga Gallium 31 69.723
Ge Germanium 32 72.590
H Hydrogen 1 1.008
He Helium 2 4.003
Hf Hafnium 72 178.490
Hg Mercury 80 200.590
53 Iodine I 126.90
In Indium 49 114.820
Ir Iridium 77 192.220
K Potassium 19 39.098
Kr Krypton 36 83.800
Li Lithium 3 6.941
Mg Magnesium 12 24.305
Symbol Name Atomic Number Atomic Weight
Mn Manganese 25 54.938
Mo Molybdenum 42 95.940
N Nitrogen 7 14.007
Na Sodium 11 22.990
Nb Niobium 41 92.906
Ne Neon 10 20.1797
Ni Nickel 28 58.690
O Oxygen 8 15.999
Os Osmium 76 190.200
P Phosphorus 15 30.974
Pb Lead 82 207.200
Pd Palladium 46 106.420
Pt Platinum 78 195.080
Rb Rubidium 37 85.468
Rh Rhodium 45 102.906
Ru Ruthenium 44 101.070
S Sulphur 16 32.060
Sb Antimony 51 121.750
Sc Scandium 21 44.9559
Se Selenium 34 78.960
Si Silicon 14 28.086
Sn Tin 50 118.690
Sr Strontium 38 87.620
Ta Tantalum 73 180.948
Ti Titanium 22 47.880
Tl Thallium 81 204.38
U Uranium 92 238.029
V Vanadium 23 50.942
W Tungsten 74 183.850
Xe Xenon 54 131.293
Y Yttrium 39 88.90585
Zn Zinc 30 65.380
Zr Zirconium 40 91.220

Full periodic table

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