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

You can see that there is no value in studying inner shell electrons to ask questions about bonding.

你应该了解考虑成键时,去考虑内层电子,是毫无意义的。

麻省理工公开课 - 固态化学导论课程节选

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

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

There is a huge difference between the energies in the outermost shell and the inner shells, which tells you that it's unlikely that any electrons except those in the outermost shell are going to be active.

最外层和最里层所具有的能量,有很大差异，而这告诉我们有一点是不太可能的,那就是除了最外层的电子,别的电子都是应该是活泼的。

麻省理工公开课 - 固态化学导论课程节选

If you look at oxygen, oxygen is 1s2, which is an inner shell electron.

你看，氧是1s2原子，1s轨道上是内层电子。

麻省理工公开课 - 固态化学导论课程节选

That's associated with one, n equals one, inner shell.

它和1紧密联系，n等于1，在内层时。

麻省理工公开课 - 固态化学导论课程节选