Group
Period
1
2
3
4
5
6
7
H
1.008
Li
6.94
11
Na
22.990
19
K
39.098
37
Rb
85.468
55
Cs
132.91
87
Fr
[223.02]
Be
9.0122
12
Mg
24.305
20
Ca
40.078
38
Sr
87.62
56
Ba
137.33
88
Ra
[226.03]
21
Sc
44.956
39
Y
88.906
71
Lu
174.97
103
Lr
[262.11]
22
Ti
47.867
40
Zr
91.224
72
Hf
178.49
104
Rf
[265.13]
23
V
50.942
41
Nb
92.906
73
Ta
180.95
105
Db
[268.13]
24
Cr
51.996
42
Mo
95.96
74
W
183.84
106
Sg
[271.13]
25
Mn
54.938
43
Tc
[97.91]
75
Re
186.21
107
Bh
[270]
26
Fe
55.845
44
Ru
101.07
76
Os
190.23
108
Hs
[277.15]
27
Co
58.933
45
Rh
102.91
77
Ir
192.22
109
Mt
[276.15]
28
Ni
58.693
46
Pd
106.42
78
Pt
195.08
110
Ds
[281.16]
29
Cu
63.546
47
Ag
107.87
79
Au
196.97
111
Rg
[280.16]
30
Zn
65.38
48
Cd
112.41
80
Hg
200.59
112
Cn
[285.17]
B
10.81
13
Al
26.982
31
Ga
69.723
49
In
114.82
81
Tl
204.38
113
Uut
[284.18]
C
12.011
14
Si
28.085
32
Ge
72.63
50
Sn
118.71
82
Pb
207.2
114
Fl
[289.19]
N
14.007
15
P
30.974
33
As
74.922
51
Sb
121.76
83
Bi
208.98
115
Uup
[288.19]
8
O
15.999
16
S
32.06
34
Se
78.97
52
Te
127.50
84
Po
[208.98]
116
Lv
[293]
9
F
18.998
17
Cl
35.45
35
Br
79.904
53
I
126.90
85
At
[209.99]
117
Uus
[294]
He
4.0026
10
Ne
20.180
18
Ar
39.948
36
Kr
83.798
54
Xe
131.29
86
Rn
222.02
118
Uuo
*Lanthanides
**Actinides
57
La
138.91
89
Ac
[227.03]
58
Ce
140.12
90
Th
232.04
59
Pr
140.91
91
Pa
231.04
60
Nd
144.24
92
U
238.03
61
Pm
[144.91]
93
Np
[237.05]
62
Sm
150.36
94
Pu
[244.06]
63
Eu
151.96
95
Am
[243.06]
64
Gd
157.25
96
Cm
[247.07]
65
Tb
158.93
97
Bk
66
Dy
162.50
98
Cf
[251.08]
67
Ho
164.93
99
Es
[252.08]
68
Er
167.26
100
Fm
[257.10]
69
Tm
168.93
101
Md
[258.10]
70
Yb
173.05
102
No
[259.10]