Here is an example that shows some very, very metallic elements, groups one and two, and some non-metallic elements over here, five, six and seven.

举个例子,这个例子表明金属元素，第一族和第二族，与一些非金属元素,在这里，第五族，第六族，和第七族。

麻省理工公开课 - 固态化学导论课程节选

So, these are poor electron donors but also a good electron acceptors, and we call these non-metals.

所以这些元素都不易失电子,但是它们是很好的电子受体，我们把这些叫做非金属。

麻省理工公开课 - 固态化学导论课程节选

And, these are called semi-metals or metalloids.

这些元素被称作半金属或非金属。

麻省理工公开课 - 固态化学导论课程节选

So, when the value of the average valence electron energy lies between 11 eV and 13 eV, we have these elements that are neither fish nor fowl, and you'll see in a little bit their unique electrical properties.

所以，当平均价电子能,在11eV到13eV之间时，这些元素介于金属和非金属之间，你们将进一步,看到它们独特的电性质。

麻省理工公开课 - 固态化学导论课程节选