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References
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Periodic Table of Elements
Roll over any element to see more information.
Hydrogen
Atomic Number: 1
Atomic Weight: 1.0079
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Helium
Atomic Number: 2
Atomic Weight: 4.0026
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Lithium
Atomic Number: 3
Atomic Weight: 6.941
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Beryllium
Atomic Number: 4
Atomic Weight: 9.0122
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Boron
Atomic Number: 5
Atomic Weight: 10.811
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Carbon
Atomic Number: 6
Atomic Weight: 12.0107
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Nitrogen
Atomic Number: 7
Atomic Weight: 14.0067
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Oxygen
Atomic Number: 8
Atomic Weight: 15.9994
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Fluorine
Atomic Number: 9
Atomic Weight: 18.9984
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Neon
Atomic Number: 10
Atomic Weight: 20.1797
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Sodium
Atomic Number: 11
Atomic Weight: 22.9897
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Magnesium
Atomic Number: 12
Atomic Weight: 24.305
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Aluminum
Atomic Number: 13
Atomic Weight: 26.9815
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Silicon
Atomic Number: 14
Atomic Weight: 28.0855
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Phosphorus
Atomic Number: 15
Atomic Weight: 30.9738
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Sulfur
Atomic Number: 16
Atomic Weight: 32.065
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Chlorine
Atomic Number: 17
Atomic Weight: 35.453
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Argon
Atomic Number: 18
Atomic Weight: 39.948
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Potassium
Atomic Number: 19
Atomic Weight: 39.0983
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Calcium
Atomic Number: 20
Atomic Weight: 40.078
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Scandium
Atomic Number: 21
Atomic Weight: 44.9559
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Titanium
Atomic Number: 22
Atomic Weight: 47.867
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Vanadium
Atomic Number: 23
Atomic Weight: 50.9415
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Chromium
Atomic Number: 24
Atomic Weight: 51.9961
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Manganese
Atomic Number: 25
Atomic Weight: 54.938
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Iron
Atomic Number: 26
Atomic Weight: 55.845
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Cobalt
Atomic Number: 27
Atomic Weight: 58.9332
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Nickel
Atomic Number: 28
Atomic Weight: 58.6934
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Copper
Atomic Number: 29
Atomic Weight: 63.546
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Zinc
Atomic Number: 30
Atomic Weight: 65.39
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Gallium
Atomic Number: 31
Atomic Weight: 69.723
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Germanium
Atomic Number: 32
Atomic Weight: 72.64
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Arsenic
Atomic Number: 33
Atomic Weight: 74.9216
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Selenium
Atomic Number: 34
Atomic Weight: 78.96
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Bromine
Atomic Number: 35
Atomic Weight: 79.904
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Krypton
Atomic Number: 36
Atomic Weight: 83.8
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Rubidium
Atomic Number: 37
Atomic Weight: 85.4678
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Strontium
Atomic Number: 38
Atomic Weight: 87.62
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Yttrium
Atomic Number: 39
Atomic Weight: 88.9059
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Zirconium
Atomic Number: 40
Atomic Weight: 91.224
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Niobium
Atomic Number: 41
Atomic Weight: 92.9064
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Molybdenum
Atomic Number: 42
Atomic Weight: 95.94
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Technetium
Atomic Number: 43
Atomic Weight: 99
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Ruthenium
Atomic Number: 44
Atomic Weight: 101.07
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Rhodium
Atomic Number: 45
Atomic Weight: 102.9055
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Palladium
Atomic Number: 46
Atomic Weight: 106.42
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Silver
Atomic Number: 47
Atomic Weight: 107.8682
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Cadmium
Atomic Number: 48
Atomic Weight: 112.411
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Indium
Atomic Number: 49
Atomic Weight: 114.818
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Tin
Atomic Number: 50
Atomic Weight: 118.71
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Antimony
Atomic Number: 51
Atomic Weight: 121.76
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Tellurium
Atomic Number: 52
Atomic Weight: 127.6
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Iodine
Atomic Number: 53
Atomic Weight: 126.9045
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Xenon
Atomic Number: 54
Atomic Weight: 131.293
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Cesium
Atomic Number: 55
Atomic Weight: 132.9055
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Barium
Atomic Number: 56
Atomic Weight: 137.327
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Lanthanum
Atomic Number: 57
Atomic Weight: 138.9055
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Cerium
Atomic Number: 58
Atomic Weight: 140.116
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Praseodymium
Atomic Number: 59
Atomic Weight: 140.9077
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Neodymium
Atomic Number: 60
Atomic Weight: 144.24
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Promethium
Atomic Number: 61
Atomic Weight: 147
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Samarium
Atomic Number: 62
Atomic Weight: 150.36
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Europium
Atomic Number: 63
Atomic Weight: 151.964
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Gadolinium
Atomic Number: 64
Atomic Weight: 157.25
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Terbium
Atomic Number: 65
Atomic Weight: 158.9253
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Dysprosium
Atomic Number: 66
Atomic Weight: 162.5
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Holmium
Atomic Number: 67
Atomic Weight: 164.9303
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Erbium
Atomic Number: 68
Atomic Weight: 167.259
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Thulium
Atomic Number: 69
Atomic Weight: 168.9342
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Ytterbium
Atomic Number: 70
Atomic Weight: 173.04
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Lutetium
Atomic Number: 71
Atomic Weight: 174.967
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Hafnium
Atomic Number: 72
Atomic Weight: 178.49
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Tantalum
Atomic Number: 73
Atomic Weight: 180.9479
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Tungsten
Atomic Number: 74
Atomic Weight: 183.84
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Rhenium
Atomic Number: 75
Atomic Weight: 186.207
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Osmium
Atomic Number: 76
Atomic Weight: 190.23
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Iridium
Atomic Number: 77
Atomic Weight: 192.217
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Platinum
Atomic Number: 78
Atomic Weight: 195.078
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Gold
Atomic Number: 79
Atomic Weight: 196.9665
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Mercury
Atomic Number: 80
Atomic Weight: 200.59
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Thallium
Atomic Number: 81
Atomic Weight: 204.3833
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Lead
Atomic Number: 82
Atomic Weight: 207.2
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Bismuth
Atomic Number: 83
Atomic Weight: 208.9804
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Polonium
Atomic Number: 84
Atomic Weight: 210
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Astatine
Atomic Number: 85
Atomic Weight: 210
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Radon
Atomic Number: 86
Atomic Weight: 222
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Francium
Atomic Number: 87
Atomic Weight: 223
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Radium
Atomic Number: 88
Atomic Weight: 226
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Actinium
Atomic Number: 89
Atomic Weight: 227
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Thorium
Atomic Number: 90
Atomic Weight: 232.0381
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Protactinium
Atomic Number: 91
Atomic Weight: 231.0359
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Uranium
Atomic Number: 92
Atomic Weight: 238.0289
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Neptunium
Atomic Number: 93
Atomic Weight: 237
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Plutonium
Atomic Number: 94
Atomic Weight: 244
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Americium
Atomic Number: 95
Atomic Weight: 243
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Curium
Atomic Number: 96
Atomic Weight: 247
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Berkelium
Atomic Number: 97
Atomic Weight: 247
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Californium
Atomic Number: 98
Atomic Weight: 252
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Einsteinium
Atomic Number: 99
Atomic Weight: 254
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Fermium
Atomic Number: 100
Atomic Weight: 257
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Mendelevium
Atomic Number: 101
Atomic Weight: 258
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Nobelium
Atomic Number: 102
Atomic Weight: 259
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Lawrencium
Atomic Number: 103
Atomic Weight: 262
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Rutherfordium
Atomic Number: 104
Atomic Weight: 261
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Dubnium
Atomic Number: 105
Atomic Weight: 262
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Seaborgium
Atomic Number: 106
Atomic Weight: 266
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Bohrium
Atomic Number: 107
Atomic Weight: 264
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Hassium
Atomic Number: 108
Atomic Weight: 277
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Meitnerium
Atomic Number: 109
Atomic Weight: 268
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