族
周期
ⅠA
O
1
1 H
1.008
ⅡA
ⅢA
ⅣA
ⅤA
ⅥA
ⅦA
2 He
4.003
2
3 Li
6.941
4 Be
9.01
5 B
10.811
6 C
12.010
7 N
14.0067
8 O
15.999
9 F
18.998
10 Ne
20.179
3
11 Na
22.989
12 Mg
24.305
13 Al
26.981
14 Si
28.085
15 P
30.973
16 S
32.066
17 Cl
35.452
18 Ar
39.948
