So, let's go ahead and draw our Lewis structure based on the rest of the rules now that we have a skeleton.

那么，让我们继续画我们的路易斯结构,看看在得到骨架之后还有哪些规则。

麻省理工公开课 - 化学原理课程节选

So, our second step, as we go through our Lewis structure rules, is to figure out how many valence electrons we have in our entire molecule.

那么，我们的第二步，按照路易斯结构的规则，应该是判断在整个分子中,包含多少个价电子。

麻省理工公开课 - 化学原理课程节选

So this means we can actually calculate this for any molecule that we've drawn the Lewis structure for, because we actually do need to draw the Lewis structure before we know, for example, how many of each of these we have, or at least go through the rules.

这意味着我们可以将原来画过,路易斯结构的分子的形式电荷计算出来，因为我们其实在画出,路易斯结构之后才能知道，比如，这些量的值是多少，或者至少我们需要经过前面的那些步骤。

麻省理工公开课 - 化学原理课程节选

And when we follow the Aufbau principle, we have to follow two other rules.

当我们遵从奥弗堡原理时，我们还需遵从两个其他的规则。

麻省理工公开课 - 化学原理课程节选

So we have two electrons in our bonding orbital, but because we use the same rules to fill up molecular orbitals as we do atomic orbitals, so the Pauli exclusion principle tells us we can't have more than two electrons per orbital, so we have to go up to our anti-bonding orbital here.

所以在成键轨道上有两个电子，但因为我们用了和原子轨道时,用的相同的规则，所以Pauli不相容原理告诉我们,一个轨道上不能有两个以上的电子，所以我们需要填充到反键轨道上去。

麻省理工公开课 - 化学原理课程节选