So the correct answer for titanium plus two Ar3d2 is going to be argon 3 d 2, whereas if we did not rearrange our order here 4s2 we might have been tempted to write as 4 s 2 so keep that in mind when you're doing the positive ions of corresponding atoms.

所以正2价钛离子,的正确答案是，然而如果我们不重新安排顺序,我们可能会写出2,所以请记住,它当你们在解关于原子,的正离子的时候。

麻省理工公开课 - 化学原理课程节选

My point here was only to say we shouldn't be so quick to think that we have to believe in the existence of a soul in order to explain our having free will.

我的观点不过就是说我们不应该这么草率地,认为我们不得不相信,灵魂的存在,从而解释我们有自由意志

耶鲁公开课 - 死亡课程节选

So our bond order for h e 2 is going to be equal to 0.

所以He2的键序等于0。

麻省理工公开课 - 化学原理课程节选