So do you think noble gases would have a high positive electron affinity, a low positive, or negative electron affinity?

那么，你认为稀有气体的电子亲和能,应该是一个高的正值，一个低的正值，还是一个负值？

麻省理工公开课 - 化学原理课程节选

So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.

比如，以氯为例，我们可以说氯的电子亲和能,应该等于正的，349，千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

For example, the positive ions, these are electron deficient.

例如，正离子，是缺少电子的。

麻省理工公开课 - 固态化学导论课程节选

So, what we're looking at here is the force when we have two charged particles, one positive one negative -- here, the nucleus and an electron.

我们现在研究的是,一正一负俩个带电粒子之间的,作用力-在这里。

麻省理工公开课 - 化学原理课程节选

But we'll go over that, particularly some exceptions, when we're filling in electron configurations, and how we would go about doing that for positive ions, which follow a little bit of a different procedure.

但是我们将会重温它们，特别是一个特例，当我们填充一个电子构型，而且我们会如何着手,处理阳离子，它遵从一些别的不同的过程。

麻省理工公开课 - 化学原理课程节选

So, basically any time we have a really high positive number of electron affinity, it means that that atom or ion really wants to gain another electron, and it will be very stable and happy if it does so.

因此，基本上无论什么时候,只要我们有一个很大的正的电子亲和能，这就意味着这个原子,或离子非常希望得到一个电子，如果它得到了，会变得更稳定更开心。

麻省理工公开课 - 化学原理课程节选

The positive ions are electron deficient, and these are known as cations.

正离子是缺少电子的，这些就是正离子。

麻省理工公开课 - 固态化学导论课程节选

And shielding is a little bit of a misnomer because it's not actually that's the electron's blocking the charge from another electron, it's more like you're canceling out a positive attractive force with a negative repulsive force.

屏蔽有一点点用词不当,因为它事实上不是,电子阻挡了来自另一个电子的电荷,它更像你在用一个负排斥力，抵消一个正吸引力,但是屏蔽是考虑这个问题,的很好的方式。

麻省理工公开课 - 化学原理课程节选

You have a positive electrode here and the electron is charged negatively.

你有一个正电极,电子带的是负电荷。

麻省理工公开课 - 固态化学导论课程节选

Electron affinity, however, can be either negative or it can be positive.

但是，电子亲和能既可以是负的,也可以是正的。

麻省理工公开课 - 化学原理课程节选

So you don't want to put in a negative energy, that's not going to help you out, you need to put in positive energy to get an electron out of the system. So that's why you'll find binding energies are always negative, and ionization energies are always going to be positive, or you could look at the equation and see it from there as well.

因为这对电离没有帮助,你需要一个正的能量,使得电子脱离这个系统,这就是为什么你会发现,结合能总是负的而电离能总是正的,或者你们看这个方程也可以发现这一点。

麻省理工公开课 - 化学原理课程节选