7 N
氮
14.01
8 O
氧
16.00
9 F
氟
19.00
10 Ne
氖
20.18
15 P
磷
30.97
16 S
硫
32.07
17 Cl
氯
35.45
18 Ar
氩
39.95
33 As
砷
74.92
34 Se
硒
78.96
35 Br
溴
79.90
36 Kr
氪
83.80