1
H
1.008
2
He
4.003
Helium
3
Li
6.94
4
Be
9.012
5
B
10.81
6
C
12.01
7
N
14.00
8
O
15.99
9
F
19.00
Flourine
10
Ne
20.18
Neon
11
Na
22.99
12
Mg
24.30
13
Al
26.98
14
Si
28.08
15
P
30.97
16
S
32.06
17
Cl
35.45
Chlorine
18
Ar
39.95
Argon
19
K
39.10
20
Ca
40.08
21
Sc
44.96
22
Ti
47.87
23
V
50.94
24
Cr
52.00
25
Mn
54.94
26
Fe
55.85
27
Co
58.93
28
Ni
58.69
29
Cu
63.55
30
Zn
65.38
31
Ga
69.72
32
Ge
72.63
33
As
74.92
34
Se
78.97
35
Br
79.90
Bromine
36
Kr
83.80
Krypton
37
Rb
85.47
38
Sr
87.62
39
Y
88.91
40
Zr
91.22
41
Nb
92.91
42
Mo
95.95
43
Tc
44
Ru
101.1
45
Rh
102.9
46
Pd
106.4
47
Ag
107.9
48
Cd
112.4
49
In
114.8
50
Sn
118.7
51
Sb
121.8
52
Te
127.6
53
I
126.9
Iodine
54
Xe
131.3
Xenon
55
Cs
132.9
56
Ba
137.3
72
Hf
178.5
73
Ta
180.9
74
W
183.8
75
Re
186.2
76
Os
190.2
77
Ir
192.2
78
Pt
195.1
79
Au
197.0
80
Hg
200.6
81
Tl
204.3
82
Pb
207.2
83
Bi
209.0
84
Po
85
At
Astatine
86
Rn
Radon
87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Ds
111
Rg
112
Cn
113
Nh
114
Fl
115
Mc
116
Lv
117
Ts
118
Og
Oganesson