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- s
- block
- p
- block
- d
- block
- f
- block
- β⁻
- Beta decay
- 1 H Hydrogen 1.008
- 2 He Helium 4.0026
- 3 Li Lithium 6.94
- 4 Be Beryllium 9.0122
- 5 B Boron 10.81
- 6 C Carbon 12.011
- 7 N Nitrogen 14.007
- 8 O Oxygen 15.999
- 9 F Fluorine 18.998
- 10 Ne Neon 20.180
- 11 Na Sodium 22.990
- 12 Mg Magnesium 24.305
- 13 Al Aluminium 26.982
- 14 Si Silicon 28.085
- 15 P Phosphorus 30.974
- 16 S Sulfur 32.06
- 17 Cl Chlorine 35.45
- 18 Ar Argon 39.948
- 19 K Potassium 39.098
- 20 Ca Calcium 40.078
- 21 Sc Scandium 44.956
- 22 Ti Titanium 47.867
- 23 V Vanadium 50.942
- 24 Cr Chromium 51.996
- 25 Mn Manganese 54.938
- 26 Fe Iron 55.845
- 27 Co Cobalt 58.933
- 28 Ni Nickel 58.693
- 29 Cu Copper 63.546
- 30 Zn Zinc 65.38
- 31 Ga Gallium 69.723
- 32 Ge Germanium 72.630
- 33 As Arsenic 74.922
- 34 Se Selenium 78.971
- 35 Br Bromine 79.904
- 36 Kr Krypton 83.798
- 37 Rb Rubidium 85.468
- 38 Sr Strontium 87.62
- 39 Y Yttrium 88.906
- 40 Zr Zirconium 91.224
- 41 Nb Niobium 92.906
- 42 Mo Molybdenum 95.95
- 43 Tc Technetium (98)
- 44 Ru Ruthenium 101.07
- 45 Rh Rhodium 102.91
- 46 Pd Palladium 106.42
- 47 Ag Silver 107.87
- 48 Cd Cadmium 112.41
- 49 In Indium 114.82
- 50 Sn Tin 118.71
- 51 Sb Antimony 121.76
- 52 Te Tellurium 127.60
- 53 I Iodine 126.90
- 54 Xe Xenon 131.29
- 55 Cs Caesium 132.91
- 56 Ba Barium 137.33
- 57 La Lanthanum 138.91
- 58 Ce Cerium 140.12
- 59 Pr Praseodymium 140.91
- 60 Nd Neodymium 144.24
- 61 Pm Promethium (145)
- 62 Sm Samarium 150.36
- 63 Eu Europium 151.96
- 64 Gd Gadolinium 157.25
- 65 Tb Terbium 158.93
- 66 Dy Dysprosium 162.50
- 67 Ho Holmium 164.93
- 68 Er Erbium 167.26
- 69 Tm Thulium 168.93
- 70 Yb Ytterbium 173.05
- 71 Lu Lutetium 174.97
- 72 Hf Hafnium 178.49
- 73 Ta Tantalum 180.95
- 74 W Tungsten 183.84
- 75 Re Rhenium 186.21
- 76 Os Osmium 190.23
- 77 Ir Iridium 192.22
- 78 Pt Platinum 195.08
- 79 Au Gold 196.97
- 80 Hg Mercury 200.59
- 81 Tl Thallium 204.38
- 82 Pb Lead 207.2
- 83 Bi Bismuth 208.98
- 84 Po Polonium (209)
- 85 At Astatine (210)
- 86 Rn Radon (222)
- 87 Fr Francium (223)
- 88 Ra Radium (226)
- 89 Ac Actinium (227)
- 90 Th Thorium 232.04
- 91 Pa Protactinium 231.04
- 92 U Uranium 238.03
- 93 Np Neptunium (237)
- 94 Pu Plutonium (244)
- 95 Am Americium (243)
- 96 Cm Curium (247)
- 97 Bk Berkelium (247)
- 98 Cf Californium (251)
- 99 Es Einsteinium (252)
- 100 Fm Fermium (257)
- 101 Md Mendelevium (258)
- 102 No Nobelium (259)
- 103 Lr Lawrencium (266)
- 104 Rf Rutherfordium (267)
- 105 Db Dubnium (268)
- 106 Sg Seaborgium (269)
- 107 Bh Bohrium (270)
- 108 Hs Hassium (277)
- 109 Mt Meitnerium (278)
- 110 Ds Darmstadtium (281)
- 111 Rg Roentgenium (282)
- 112 Cn Copernicium (285)
- 113 Nh Nihonium (286)
- 114 Fl Flerovium (289)
- 115 Mc Moscovium (290)
- 116 Lv Livermorium (293)
- 117 Ts Tennessine (294)
- 118 Og Oganesson (294)
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6
7
8
9
10
11
12
13
14
17Halogens
18
1s
2s
3s
4s
5s
6s
7s
2p
3p
4p
5p
6p
7p
3d
4d
5d
6d
4f
5f
Atomic
Symbol
Name
Weight
1
2
3
4
5
6
57–71
6
7
89–103
7
For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.