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 |