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Standard Atomic Weights Of Commonly Encountered
Elements in order of atomic number

Name Symbol Atomic Number Atomic Weight
Hydrogen H 1 1.008
Helium He 2 4.003
Lithium Li 3 6.941
Beryllium Be 4 9.012
Boron B 5 10.810
Carbon C 6 12.011
Nitrogen N 7 14.007
Oxygen O 8 15.999
Fluorine F 9 18.998
Neon Ne 10 20.1797
Sodium Na 11 22.990
Magnesium Mg 12 24.305
Aluminium Al 13 26.982
Silicon Si 14 28.086
Phosphorus P 15 30.974
Sulphur S 16 32.060
Chlorine Cl 17 35.453
Argon Ar 18 39.948
Potassium K 19 39.098
Calcium Ca 20 40.080
Scandium Sc 21 44.9559
Titanium Ti 22 47.880
Vanadium V 23 50.942
Chromium Cr 24 51.996
Manganese Mn 25 54.938
Iron Fe 26 55.847
Cobalt Co 27 58.933
Nickel Ni 28 58.690
Copper Cu 29 63.546
Zinc Zn 30 65.380
Gallium Ga 31 69.723
Germanium Ge 32 72.590
Arsenic As 33 74.922
Selenium Se 34 78.960
Name Symbol Atomic Number Atomic Weight
Bromine Br 35 79.904
Krypton Kr 36 83.800
Rubidium Rb 37 85.468
Strontium Sr 38 87.620
Yttrium Y 39 88.90585
Zirconium Zr 40 91.220
Niobium Nb 41 92.906
Molybdenum Mo 42 95.940
Technetium Tc 43 98
Ruthenium Ru 44 101.070
Rhodium Rh 45 102.906
Palladium Pd 46 106.420
Silver Ag 47 107.868
Cadmium Cd 48 112.410
Indium In 49 114.820
Tin Sn 50 118.690
Antimony Sb 51 121.750
Tellurium Te 52 127.60
Iodine I 53 126.90
Xenon Xe 54 131.293
Caesium Cs 55 132.905
Barium Ba 56 137.330
Hafnium Hf 72 178.490
Tantalum Ta 73 180.948
Tungsten W 74 183.850
Osmium Os 76 190.200
Iridium Ir 77 192.220
Platinum Pt 78 195.080
Gold Au 79 196.967
Mercury Hg 80 200.590
Thallium Tl 81 204.38
Lead Pb 82 207.200
Bismuth Bi 83 208.980
Uranium U 92 238.029

Full periodic table

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