Atomic Weights

Name of Element Symbol Atomic Number Atomic Mass
Actinium Ac 89 227.0278
Aluminum Al 13 26.98154
Americium Am 95 (243)
Antimony Sb 51 121.75
Argon Ar 18 39.948
Arsenic As 33 74.9216
Astatine At 85 (210)
Barium Ba 56 137.33
Berkelium Bk 97 (247)
Beryllium Be 4 9.01218
Bismuth Bi 83 208.9804
Boron B 5 10.81
Bromine Br 35 79.904
Cadmium Cd 48 112.41
Cesium Cs 55 132.9054
Calcium Ca 20 40.08
Californium Cf 98 (251)
Carbon C 6 12.011
Cerium Ce 58 140.12
Chlorine Cl 17 35.453
Chromium Cr 24 51.996
Cobalt Co 27 58.9332
Copper Cu 29 63.546
Curium Cm 96 (247)
Dysprosium Dy 66 162.50
Einsteinium Es 99 (254)
Erbium Er 68 167.26
Europium Eu 63 151.96
Fermium Fm 100 (257)
Fluorine F 9 18.998403
Francium Fr 87 (223)
Gadolinium Gd 64 157.25
Gallium Ga 31 69.72
Germanium Ge 32 72.59
Gold Au 79 196.9665
Hafnium Hf 72 178.49
Helium He 2 4.00260
Holmium Ho 67 164.9304
Hydrogen H 1 1.0079
Indium In 49 114.82
Iodine I 53 126.9045
Iridium Ir 77 192.22
Iron Fe 26 55.847
Krypton Kr 36 83.80
Lanthanum La 57 138.9055
Lawrencium Lr 103 (260)
Lead Pb 82 207.2
Lithium Li 3 6.941
Lutetium Lu 71 174.97
Magnesium Mg 12 24.305
Manganese Mn 25 54.9380
Mendelevium Md 101 (258)
Mercury Hg 80 200.59
Molybdenum Mo 42 95.94
Neodymium Nd 60 144.24
Neon Ne 10 20.179
Neptunium Np 93 237.0482
Nickel Ni 28 58.70
Niobium Nb 41 92.9064
Nitrogen N 7 14.0067
Nobelium No 102 (259)
Osmium Os 76 190.2
Oxygen O 8 15.9994
Palladium Pd 46 106.4
Phosphorus P 15 30.97376
Platinum Pt 78 195.09
Plutonium Pu 94 (244)
Polonium Po 84 (209)
Potassium K 19 39.0983
Praseodymium Pr 59 140.9077
Promethium Pm 61 (145)
Protactinium Pa 91 231.0359
Radium Ra 88 226.0254
Radon Rn 86 (222)
Rhenium Re 75 186.207
Rhodium Rh 45 102.9055
Rubidium Rb 37 85.4678
Ruthenium Ru 44 101.07
Samarium Sm 62 150.4
Scandium Sc 21 44.9559
Selenium Se 34 78.96
Silicon Si 14 28.0855
Silver Ag 47 107.868
Sodium Na 11 22.98977
Strontium Sr 38 87.62
Sulfur S 16 32.06
Tantalum Ta 73 180.9479
Technetium Tc 43 (97)
Tellurium Te 52 127.60
Terbium Tb 65 158.9254
Thallium Tl 81 204.37
Thorium Th 90 232.0381
Thulium Tm 69 168.9342
Tin Sn 50 118.69
Titanium Ti 22 47.90
Tungsten W 74 183.85
Uranium U 92 238.029
(Unnilhhexium) (Unh) 106 (263)
(Unnilennium) (Unn) 109 (266)
(Unniloctium) (Uno) 108 (265)
(Unnilpentium) (Unp) 105 (262)
(Unnilquadium) (Unq) 104 (261)
(Unnilseptium) (Uns) 107 (262)
Vanadium V 23 50.9414
Xenon Xe 54 131.30
Ytterbium Yb 70 173.04
Yttrium Y 39 88.9059
Zinc Zn 30 65.38
Zirconium Zr 40 91.22