And other countries are ready to fill the gap. We already import about But the oil spill is expected to drive that number higher.

VOA: standard.2010.05.27

what three quantum numbers tell us, versus what the fourth quantum number can fill in for us in terms of information.

三个量子数和,四个量子数告诉我们的信息。

麻省理工公开课 - 化学原理课程节选

So here we have that graphed here, Z we have atomic number z graphed against ionization energy, so, let's fill in what the actual atoms are here, and we can see in general, yes, we're following the trend.

这就是我们要画的，横坐标是原子序数，纵坐标是电离能，让我们把真正的原子填上去，我们可以看出，总体来说，没错，满足规律。

麻省理工公开课 - 化学原理课程节选

So to figure out bonding electrons, -- what we take is that number 18, which is our total number of electrons we need to fill valence shells, and we subtract it from our number of valence electrons, which is 10.

那么为了找出成键电子，我们将十八，也就是填满所有价壳层,所需要电子的总个数，减去我们所有的价电子的个数，也就是十。

麻省理工公开课 - 化学原理课程节选