1 H Hydrogen 1.008
2 He Helium 4.0026
3 Li Lithium 6.941
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 20.18
11 Na Sodium 22.99
12 Mg Magnesium 24.305
13 Al Aluminum 26.982
14 Si Silicon 28.086
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 72.63
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 98.0
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 127.6
53 I Iodine 126.9
54 Xe Xenon 131.29
55 Cs Cesium 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 145.0
62 Sm Samarium 150.36
63 Eu Europium 151.96
64 Gd Gadolinium 157.25
65 Tb Terbium 158.93
66 Dy Dysprosium 162.5
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 209.0
85 At Astatine 210.0
86 Rn Radon 222.0
87 Fr Francium 223.0
88 Ra Radium 226.0
89 Ac Actinium 227.0
90 Th Thorium 232.04
91 Pa Protactinium 231.04
92 U Uranium 238.03
93 Np Neptunium 237.0
94 Pu Plutonium 244.0
95 Am Americium 243.0
96 Cm Curium 247.0
97 Bk Berkelium 247.0
98 Cf Californium 251.0
99 Es Einsteinium 252.0
100 Fm Fermium 257.0
101 Md Mendelevium 258.0
102 No Nobelium 259.0
103 Lr Lawrencium 266.0
104 Rf Rutherfordium 267.0
105 Db Dubnium 268.0
106 Sg Seaborgium 269.0
107 Bh Bohrium 270.0
108 Hs Hassium 277.0
109 Mt Meitnerium 278.0
110 Ds Darmstadtium 281.0
111 Rg Roentgenium 282.0
112 Cn Copernicium 285.0
113 Nh Nihonium 286.0
114 Fl Flerovium 289.0
115 Mc Moscovium 290.0
116 Lv Livermorium 293.0
117 Ts Tennessine 294.0
118 Og Oganesson 294.0
*
**
* Lanthanides
** Actinides