What if we capture all of the valence electrons?
如果我们捕获了所有价电子会怎样呢？
We solve this problem by a quantity called the average valence electron energy.
我们通过一个叫做平均价电子能的量来解决这一问题。
Now with this framework, I said that talking about these valence electrons might give us some insight into chemical reactivity.
现在在这个结构下，我说过讨论这些价电子可能会让我们对化学反应有更深的理解。
We know that because the sulfur and the chlorine in the oxygen have different average valence electron energies, they'll have different electron affinities.
我们都知道，因为氧气中的硫和氯具有不同的平均价电子能，它们的电子亲和力也不同。
Valence is a sleepy little town just south of Lyon.
瓦朗斯是里昂正南方一个寂静的小镇。
So we have seven valence electrons.
我们有七个价电子。
And by now, I mean the valence electrons.
迄今为止，我指的是价电子。
How many valence electrons do we have left?
我们还剩下多少个价电子？
How many valence electrons are in chlorine?
氯有几个价电子？
Chlorine has a high valence electron energy.
氯的价电子能很高。
Then it says, count all the valence electrons.
然后它说，考虑所有的价电子。
These have low average valence electron energies.
他们有较低的平均价电子能。
Our next step is thinking about valence electrons.
我们下一步要考虑的是价电子。
So, what if we capture all of the valence electrons.
但是如果我们捕获了所有价电子又怎样呢。
It's got a very low average valence electron energy.
它的平均价电子能很低。
Because it is not the valence shell. Forget about it.
因为它不是价层电子，所以忘记它吧。
Again, we're just talking about the valence electrons.
同样的，我们只讨论价电子。
And, this outermost shell is termed the valence shell.
这个最外层被称作价电子层。
So this is our valence electron configuration for b 2.
这是B2的价电子构型。
So let's think about methane using valence bond theory.
让我们用价电子成键理论来看一看甲烷。
We actually need to think about those valence electrons.
我们需要考虑这些价电子。
So we're talking about four valence electrons for carbon.
那么碳有四个价电子。
How many electrons do we need to have full valence shells?
要把价层排满需要多少个电子？
And he's stripped off all of the non-valence electrons.
他忽略了所有非价层电子。
For our step two, what we need is number of valence electrons.
我们的第二步，需要知道价电子的个数。
How many do we need to get full valence shells everywhere?
要得到全部是满壳层需要多少个？
All right, well, oxygen has the highest valence electron energy.
好吧，氧具有最高价电子平均能。
And, all he's done is leave the valence electrons associated.
他所做的全部是，考虑到了价电子的关系。
So the idea behind valence bond theory is very easy to understand.
价电子成键理论，非常容易理解。
In other words, if the average energy of all the valence electrons.
换句话说，就是所有价电子的平均能量。
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