So, the chances of getting any activity from these inner shell of electrons are vanishingly small.

所以，内层电子间,进行反应的可能性,是很小很小的。

麻省理工公开课 - 固态化学导论课程节选

Because that will take care of all of the electrons that are capable of reacting, none of the inner shell electrons.

因为那样我们可以考虑到,除内层电子以外，所有可以发生反应的电子。

麻省理工公开课 - 固态化学导论课程节选

So the 3 s 1, or any of the other electrons that are in the outer-most shell, those are what we call our valence electrons, and those are where all the excitement happens.

它们是经常发生激发情况的,那也是我们所看到，我们称之为价电子，它们是经常发生激发情况的。

麻省理工公开课 - 化学原理课程节选

So we actually only need two electrons to fill up the valence shell of hydrogen, remember that's because all we need to fill up is the 1 s.

我们其实只需要两个电子,就可以将氢的价壳层排满，要记得这是因为我们只需要排满，1，s，轨道。

麻省理工公开课 - 化学原理课程节选

Core electrons are all those electrons held in really tight with the nucleus in the inner shells, whereas the valence electrons are only those electrons that are in the outer-most shell, or at your highest value of n of the principal quantum number.

芯电子是那些,在内壳层被原子核束缚得非常紧的电子，而价电子只包括,最外层的电子，或者说主量子数，n，的值最大的那些电子。

麻省理工公开课 - 化学原理课程节选