And what you can see directly from looking at this energy level diagram, is that the molecule that we have is now more stable in the individual atoms.

你从直接看,能级图中会发现，分子比单个的,原子能量更低。

麻省理工公开课 - 化学原理课程节选

You wouldn't be expected to be able to guess that this would happen, because using any kind of simple theory, we would, in fact, predict that this would not be the case, but what we find experimentally is that it's more stable to have half filled d orbital than to have a 4 s 2, and a 3 d 4.

你们不用预期有能力,猜出这个会发生，因为使用任一种简单的理论，我们事实上可以预测不会是那种情况，但是我们在实验中发现的,是半填充d轨道比,4s23d4更加稳定。

麻省理工公开课 - 化学原理课程节选