14 Si?硅?28.09
13 Al?铝?26.98
12Mg?镁?24.31
11Na?钠?22.99
10Ne?氖?20.18
3
氟?19.00
8 O?氧?16.00
9 F?
7 N?氮?14.01
6 C?碳?12.01
5 B?硼?10.81