You are Here: Home > Finishing Data > Standard Atomic Weights in reverse order of atomic number

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

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

Full periodic table

Follow us on:  

 

Schloetter Co Ltd

Abbey Works
New Road
Pershore
Worcs, UK
WR10 1BY

Tel:      +44(0)1386 552331

Web:     

E-mail:  info@schloetter.co.uk

Registered in England 947371

VAT No. GB 274 7177 31

accreditation logos