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
Aluminum
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
72.63
33
As
Arsenic
74.922
34
Se
Selenium
78.96
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
102.906
46
Pd
Palladium
106.42
47
Ag
Silver
107.868
48
Cd
Cadmium
112.414
49
In
Indium
114.818
50
Sn
Tin
118.710
51
Sb
Antimony
121.760
52
Te
Tellurium
127.60
53
I
Iodine
126.904
54
Xe
Xenon
131.293
55
Cs
Caesium
132.905
56
Ba
Barium
137.327
57
La
Lanthanum
138.905
72
Hf
Hafnium
178.49
73
Ta
Tantalum
180.948
74
W
Tungsten
183.84
75
Re
Rhenium
186.207
76
Os
Osmium
190.23
77
Ir
Iridium
192.217
78
Pt
Platinum
195.084
79
Au
Gold
196.967
80
Hg
Mercury
200.592
81
Tl
Thallium
204.38
82
Pb
Lead
207.2
83
Bi
Bismuth
208.980
84
Po
Polonium
[209]
85
At
Astatine
[210]
86
Rn
Radon
[222]
58
Ce
Cerium
140.116
59
Pr
Praseodynium
140.908
60
Nd
Neodymium
144.242
61
Pm
Promethium
[145]
62
Sm
Samarium
150.36
63
Eu
Europium
151.964
64
Gd
Gadolinium
157.25
65
Tb
Terbium
158.925
66
Dy
Dysprosium
162.500
67
Ho
Holmium
164.930
68
Er
Erbium
167.259
69
Tm
Thulium
168.934
70
Yb
Ytterbium
173.045
71
Lu
Lutetium
174.967