IIIA | IVA | VA | VIA | VIIA |
5 B 硼 (10.81) | 6 C 碳 (12.01) | 7 N 氮 (14.01) | 8 O 氧 (16.00) | 9 F 氟 (19.00) |
13 m 铝 (26.98) | 14 Si 硅 (26.98) | 15 P 磷 (30.97) | 16 S 硫 (32.07) | n Cl 氯 (35.45) |