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。

youdao

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。

youdao

Whenever you hear the term ionization energy, make sure you keep in mind that unless we say otherwise, we're talking about that first ionization energy.

但无论什么时候你听到电离能这个词，一定要记得，除非特别说明，我们都是在说第一电离能。

youdao

And specifically, when we talk about ionization energy, it's assumed that what we mean is actually the first ionization energy.

特别地，当我们讨论电离能的时候，我们默认,这指的是第一电离能。

麻省理工公开课 - 化学原理课程节选

Well, if we look on the chart, the first ionization energy is what is reported in your Periodic Table.

如果我们查阅图表，一级电离能,已经在元素周期表上标示了。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 化学原理课程节选