我们来考虑一下如何划分单键、双键和三键。

Let's think about how we can classify single and double and triple bonds,.

youdao

每行包含它所属订单的订单键。

Each row contains the order key of the order it is part of.

youdao

还记得，每次我们有两个电子被共用，我们就有了一个单键。

Remember, every time we have two electrons that are being Shared, that's a single bond.

youdao

OK, then it says draw a single bond from each surrounding atom to the central atom, and subtract two valence electrons.

后将中心原子与其相邻原子之间,连上单键，然后减掉2个价电子。

麻省理工公开课 - 固态化学导论课程节选

So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.

因此如果我们看它的键长的话，它实际上比单键更短，却比双键更长。

麻省理工公开课 - 化学原理课程节选

so you can see that there is going to be two sets in antibonding, three sets in bonding for a net of one, giving us the single bond.

因此你能看到,反键轨道上有两组，三组成键，得到一组净成键，所以成的是单键。

麻省理工公开课 - 固态化学导论课程节选