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Standard Atomic Weights
Of Commonly Encountered Elements

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

Full periodic table

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