现在这是一个开始下面内容的好地方，因为我们已经很熟悉电离能了，我们从很久以前就一直在讨论，它是从一个原子中，拿走一个电子所需要消耗的最低能量。

Now this is a good place to start, because we are very familiar with ionization energy, we've been talking about it it's that minimum energy required to remove an electron from an atom.

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那么，从电离能的角度考虑，大家会把哪个原子放在中间？

So, thinking about ionization energy, which atom would you put in the middle here?

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我们应该可以计算出任何一个,我们想要谈论的原子的有效电荷量，只要我们知道电离能是多少。

So we should be able to calculate a z effective for any atom that we want to talk about, as long as we know what that ionization energy is.

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So, you can see how this can directly give us different ionization energies for any atom that we're interested in studying.

那么，大家可以理解,这种技术如何直接给出我们所要研究的,任何一种原子的所有不同的电离能。

麻省理工公开课 - 化学原理课程节选

In terms of picking a Lewis structure that's going to be the lowest energy, what you want to do is put the atom with the lowest ionization energy in the center of your atom.

为了挑选一个具有,最低能量的路易斯结构，你需要把电离能最低的原子,放在最当中的位置。

麻省理工公开课 - 化学原理课程节选

But, in fact, we can also talk about the ionization energy of different states of the hydrogen atom or of any atom.

但实际上我们也可以讨论氢原子,或者其它任何原子的其它能级的电离能。

麻省理工公开课 - 化学原理课程节选