经常你们会被问到关于电离能。
So, oftentimes you'll just be asked about ionization energy.
对，好，我们再找最低的电离能。
那么让我们来比较一下它们的电离能。
我们可以计算这的电离能。
电离能，我们知道也就是,负的结合能。
The ionization energy, of course, is just the negative of the binding energy.
让我们来看一下电离能最低在中间的情况。
Let's take a look at the lowest ionization energy in the center case.
我们绝不会见到一个,电离能是负值的情况。
We will never have a case where ionization energy is negative.
因此，我们把电离能，最低的原子放在中间。
So, we keep the atoms with the lowest ionization energy in the center.
我们能够计算电离能。
因此，按照电离能，我们应该把硫放在中间。
So, in terms of ionization energy, we would expect to see sulfur in the middle.
我们知道结合能，总是负的，电离能总是正的。
We know that binding energy is always negative, ionization energy is always positive.
锂的一级电离能，大约是每原子5。4电子伏。
The first ionization energy of lithium is about 5.4 electron volts per atom.
这是二级电离能，这就是说，电子数第二多的电离能。
That is to say the ionization energy of the second most electron.
我们预期电离能会降低，这就意味着硫的电离能最低。
We would expect the ionization energy to decrease, that means that sulfur has our lowest ionization energy.
当我们沿着列向下走的时候，会发现电离能是在降低的。
As we go down a column, what happens is that the ionization energy decreases.
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?
那么，这就是第一电离能，下面让我们来想一想第二电离能。
So, this is first ionization energy, let's think about second ionization energy.
那么让我们将这些局限性记在心里，继续来讨论一下电离能。
So it's going to keep in mind the limitations, so let's start off with talking about ionization energy.
因此，文中为烷烃衍生物第一电离能的预测提供一种有效方法。
Therefore, this paper provides an effective method to predicate the first ionization potentials of alkyl derivatives.
因此，要想解出电离能，我们只需要将这个方程中的项变换一下位置。
So if we want to solve for ionization energy, we can just rearrange this equation.
进行类似的减法运算，得到的，2,s，电子的电离能应该是多大呢？
Same sort of subtraction problem, what do we have for the ionization energy of the 2 s electron?
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。
But, in fact, we can also talk about the ionization energy of different states of the hydrogen atom or of any atom.
电离电势(亦称电离能)：从孤立原子或分子中移去一个电子所需要的能量。
Ionization potential (ionization energy) : Amount of energy required to remove an electron from an isolated atom or molecule.
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。
If something has a high ionization energy, it means that it really, really, really does not want to give up an electron.
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.
而且你知道它等于什么，这是我们说过一遍又一遍的，电离能就等于，负的束缚能。
And we know what that's equal to, this is something we've been over and over, ionization energy is simply equal to the negative of the binding energy.
让我们用另外一个例子来讲一讲这个问题，这应该能够说清楚,各个电离能之间的区别。
So let's address this by considering another example, which should clarify what the difference is between these ionization energies.
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。
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.
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.
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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