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1·And we can calculate the ionization energy.

我们能够计算电离能。

2·So, we can now calculate the ionization energy here.

我们可以计算这的电离能。

3·So, oftentimes you'll just be asked about ionization energy.

经常你们会被问到关于电离能。

4·Yeah. OK. We're looking for the lowest ionization energy.

对，好，我们再找最低的电离能。

5·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。

6·We will never have a case where ionization energy is negative.

我们绝不会见到一个,电离能是负值的情况。

7·So, we keep the atoms with the lowest ionization energy in the center.

因此，我们把电离能，最低的原子放在中间。

8·Let's take a look at the lowest ionization energy in the center case.

让我们来看一下电离能最低在中间的情况。

9·As we go down a column, what happens is that the ionization energy decreases.

当我们沿着列向下走的时候，会发现电离能是在降低的。

10·So, in terms of ionization energy, we would expect to see sulfur in the middle.

因此，按照电离能，我们应该把硫放在中间。

电离能

1·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。

2·So, as we go down a column, we see ionization energy's going to decrease.

总之，当我们沿着列往下走的时候，我们会看到电离能在降低。

3·If something has a high ionization energy, it means that it really, really, really does not want to give up an electron.

如果某个东西有很高的电离能，这意味着它非常非常，非常不愿意失去一个电子。

4·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.

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。

5·We'll then take a turn to talking about the periodic table, we'll look at a bunch of periodic trends, including ionization energy, electron affinity, electronegativity and atomic radius.

然后我们再开始讲元素周期表，我们会看到很多周期性规律，比如电离能，电子亲和能，电负性以及原子半径。