1 H
氢
1.0079
2 He
氦
4.0026
3 Li
锂
6.941
4 Be
铍
9.0122
5 B
硼
10.811
6 C
碳
12.011
7 N
氮
14.007
8 O
氧
15.999
9 F
氟
18.998
10 Ne
氖
20.17
11 Na
钠
22.9898
12 Mg
镁
24.305
13 Al
铝
26.982
14 Si
硅
28.085
15 P
磷
30.974
16 S
硫
32.06
17 Cl
氯
35.453
18 Ar
氩
39.94
19 K
钾
39.098
20 Ca
钙
40.08 钙的符号Cajia钾也是ca钾也是ca钾的符号是k