The first ionization energy of lithium is about 5.4 electron volts per atom.
锂的一级电离能，大约是每原子5。4电子伏。
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。
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。
We talked about ionization energy, electron affinity, we talked about electronegativity, which is just kind of a combination of the first two, and then ended with atomic radius here.
我们讲了电离能的，电子亲和能的，还讲了电负性的，也就是前两个的组合，最后讲了原子半径的。
What we've learned so far is as a first approximation, what we want to do is put the atom with the lowest ionization energy in the middle here.
我们之前所学的可以作为第一近似，我们要做的是把电离能，最低的原子放在中间。
What we've learned so far is as a first approximation, what we want to do is put the atom with the lowest ionization energy in the middle here.
我们之前所学的可以作为第一近似，我们要做的是把电离能，最低的原子放在中间。
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