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So, now with this framework, I said that talking about these valence electrons might give us some insight into chemical reactivity.
所以，现在对于这个结构，我认为讨论价电子能,会让我们对化学反应有更深的领悟。
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The inner electrons are so tightly bound that they are for all intents and purposes, immobilized when it comes to reactivity.
内部电子被紧紧地束缚着,因此无论怎样，当进行反应时，它都是固定的。
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Just to refresh our memories, we looked at the average valence electron energy as a measure of reactivity.
重新回顾一下我们记忆，我们看了平均价电子能,能用来测量反应性。
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And then, towards the end of the lecture, we started looking at reactivity.
课程结束的时候，我们开始学习了反应性。
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We know that at one extreme we have no chemical reactivity.
我们知道，在一端,完全没有化学反应。
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Well, what do we know about extremes of chemical reactivity?
好吧，我们对化学反应的极限有那些了解呢？
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Because that's going to give clues as to reactivity.
因为这是化学反应的线索。
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What can we say about chemical reactivity?
我们对化学反应了解些什么呢？
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What I am going to do next day is go into the larger stoichiometry and understand the principles of mass balance and reactivity But before you go,hold it,I don't want you racing off.
下堂课我要做的是,讨论化学计量学，和,质量平衡很反应定律,但在下课之前，我不希望你们这么快走。
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Greater resistance to reactivity.
更难发生反应。
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