If we look at this configuration, what we say is all of the electrons in these inner shells are what we call core electrons.

如果我们看到这个构型，我们所说的是,所有的内层,都是核电子。

麻省理工公开课 - 化学原理课程节选

we very rarely would see these core electrons actually being involved in any type of a reaction.

我们极少见到芯电子,会参与任何类型的反应。

麻省理工公开课 - 化学原理课程节选

And I want to point out the difference between core electrons and valence electrons here.

我想指出的是,核电子和价电子,之间的区别。

麻省理工公开课 - 化学原理课程节选

The core electrons tend not to be involved in much chemistry in bonding or in reactions.

核电子倾向于不参与结合,或者反应。

麻省理工公开课 - 化学原理课程节选

So, hopefully, you remember what we mean by valence electrons versus core electrons.

希望大家还记得,价电子与芯电子的定义。

麻省理工公开课 - 化学原理课程节选

So, no matter whether or not you write out the full form here, or the noble gas configuration where you write ne first or whatever the 3s1 corresponding noble gas is to the core electrons, we always write out the valence electrons here.

所以无论你是否,写出了完整形式，或者对应于价电子的惰性气体,再一次,我们可以写Ne然后，我们总是可以在这里写出价电子。

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

So what I want to point out when you're kind of looking at these numbers here, what the significance is, look at that huge difference between what the ionization energies are for what we call those valence electrons, -- those outer shell electrons, those are core electrons there.

我在这里想要指出的是,当大家在看这些数字的时候，最重要的是，要看到这些,巨大的差异,看到所谓价电子，即外层电子的电离能与，1，s，轨道，电离能之间的巨大差异。

麻省理工公开课 - 化学原理课程节选

So let's do a quick clicker question, and you tell me how many valence electrons does fluorine have? Remember, valence electrons are different from core, they're only the outer-most electrons in the outer-most shell.

那么让我们来做一个小选择题，请大家来告诉我,氟有多少个价电子，要记得，价电子与芯电子不同，它们是在最外壳层的最靠外面的电子。

麻省理工公开课 - 化学原理课程节选