And remember again, the binding energy physically is the negative of the ionization energy, and that's actually how you can experimentally check to see if this is actually correct.

电离能的负值，那个事实上是可以,通过实验来验证，它是否是对的,并且它等于负的。

麻省理工公开课 - 化学原理课程节选

We know that this is going to be, by measurement, this is going to be plus and this is going to be minus.

我们知道通过测量，这儿将是正，这儿将是负。

麻省理工公开课 - 固态化学导论课程节选

So whenever we're thinking about energy states, it's lways more stable to be more low in an energy well, so that's why it makes sense that it's favorable, in fact, to have an electron interacting with the nucleus that stabilizes and lowers the energy of that electron by doing so.

负的能量越多，能级越低,无论何时，能级总是越低越稳定,所以这就是为什么电子更,倾向于通过和原子核相互作用,来稳定并降低电子的能级。

麻省理工公开课 - 化学原理课程节选

We see that we get a negative energy by attaching the chloride to the sodium.

我们得到了负能量,通过将氯和钠结合在一起。

麻省理工公开课 - 固态化学导论课程节选