All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?

所有的这些都是来自于第一主族和第二组主族，到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

youdao

The elements of group V A include three nonmetals — nitrogen, phosphorus, and arsenic—and two metals — antimony and bismuth.

集团外语由一个非金属、碳、两个非金属等、硅和锗，和两个金属、锡、铅。

youdao

All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?

所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

麻省理工公开课 - 固态化学导论课程节选