This is the second ionization energy. That is to say the ionization energy of the second most electron.

这是二级电离能，这就是说,电子数第二多的电离能。

麻省理工公开课 - 固态化学导论课程节选

So, second ionization energy simply means you've already taken one electron out, now how much energy does it take for you to take a second electron out.

第二电离能简单地说就是,在你已经拿走一个电子以后，再拿走第二个电子,所需要消耗的能量。

麻省理工公开课 - 化学原理课程节选

We call these first, second, third ionization energies in sequence. This is the first ionization energy.

我们按照顺序把这些叫做一级，二级,三级电离能，这是初级电离能。

麻省理工公开课 - 固态化学导论课程节选

So, this is first ionization energy, let's think about second ionization energy.

那么，这就是第一电离能，下面让我们来想一想第二电离能。

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So if we think about what that delta energy is, we call that the ionization of the 2 s, that's different from saying second ionization energy.

因此如果我们考虑这个，Δ，E，是什么的话，我们可以称它为，2，s，电子的电离能，这与我们前面所说的第二电离能是不同的。

麻省理工公开课 - 化学原理课程节选

And what we say when we talk about the delta energy is I E 2 that this is going to be equal to i e 2, or the second ionization energy, or we could say the negative of the binding energy of a 2 s electron in b plus.

那么我们说,Δ，E，应该等于，或者说第二电离能，也就是正一价硼中，2，s，电子的,束缚能的负值。

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So I've sort of just spread out what we have as the second row here, graphed against the ionization energy.

所以我将第二行的情况,在这里展了，纵坐标是电离能。

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So, let's think about kind of differentiating, however, between first ionization energy or just ionization energy, and other types such as second or third ionization energy, and let's take boron as an example here.

那么，让我们来区分一下第一电离能，也就是电离能与其他类型的电离能，比如第二，第三电离能，我们以硼为例。

麻省理工公开课 - 化学原理课程节选

If you see a problem that asks you, for example, the third ionization energy versus taking a second electron out of the 2 s in a photoelectron spectroscopy experiment, those are two very different things.

如果你遇到一个题目问你的是，比如说，是第三电离能,还是在光电子能谱实验中从，2，s，轨道中,拿走第二个电子，这可是两个完全不同的问题。

麻省理工公开课 - 化学原理课程节选