You can see that as you fill up your periodic table, it's very clear. But also we'll tell you a pneumonic device to keep that in mind, so you always remember and get the orbital energy straight.

在你们填周期表的时候，非常清楚但是我们也要告诉你们,一个策略去记住它，所以你们总是记得,并得到连续的轨道能量。

麻省理工公开课 - 化学原理课程节选

So what I want to tell you is we also always get the same bond order if we instead only deal with the valence electrons.

我想要说的是我们如果,只考虑价电子也可以得到相同的键序。

麻省理工公开课 - 化学原理课程节选