So if we add them all up, there should be no net charge on the molecule, if the molecule is neutral.

因此如果我们把它们都加起来，这个分子上应该没有净电荷，如果这个分子是中性的话。

麻省理工公开课 - 化学原理课程节选

And if we were to think about which one of these is better, it turns out that it's the same i in terms of formal charges, so that doesn't help us out.

而如果我们要考虑它们中的哪个更好，结果从形式电荷来看,它们之间没有区别，因此这不能帮我们进行判断。

麻省理工公开课 - 化学原理课程节选

And since we don't have to charge compensate, we can add or subtract neutrons at liberty.

因为我们没有电荷补偿，我们就可以随意地加上火减少中子。

麻省理工公开课 - 固态化学导论课程节选

Of course, if we saw no shielding at all what we would end up with 3 is a z effective of 3.

当然如果我们说没有任何屏蔽,我们最后得到的,有效电荷量是。

麻省理工公开课 - 化学原理课程节选

We said that that second electron was so far out of the picture, that it had absolutely no affect on what the charge was felt by that first electron.

我们说第二个电子远离这张图片,这样它就彻底的对,第一个电子感觉到的电荷没有影响了,所以。

麻省理工公开课 - 化学原理课程节选

If there is no charge on the plate, these droplets will simply fall under gravity.

如果在板子上没有电荷，这些液滴就只会由于重力掉下。

麻省理工公开课 - 固态化学导论课程节选

And there is this separation which is a balance of attractive forces because the chloride is net negative and the sodium is net positive, but both of them, regardless of net charge, have electrons.

这里有一个平衡,引力的平衡,由于氯离子带有负的净电荷,钠离子带有正的净电荷，但是它们两个，没有考虑净电荷，电子。

麻省理工公开课 - 固态化学导论课程节选

We don't actually have much charge separation in this case here.

我们在这种情况下其实没有很多电荷分开。

麻省理工公开课 - 化学原理课程节选

Often a good thing to start with is to put the lowest ionization energy atom in the middle, and if you don't have charge separation then go with that structure, but if you do find you have a lot of separation, such as the case in negative 2, positive 2, and minus 1, then you want to say wait a second, this is really bad in terms of formal charge, let me go ahead and see what other options I have here.

通常一开始把电离能最低的原子,放在中心位置就很好了，如果你发现电荷没有分开,那么这个结构就没问题了，但是如果你发现有很多分开的电荷，比如这种情况，有负二，正二和负一，那么你会想要说等一下，从形式电荷来看这很不好，让我去看看其它可能的选择。

麻省理工公开课 - 化学原理课程节选