The atom is made up of a nucleus with negative electrons revolving around it.

原子是由原子核和绕核旋转的若干负电子组成。

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We have shown that it is possible to create a radioactivity characterized by the emission of positive or negative electrons in boron and magnesium by bombardment with alpha rays.

我们已经展示了人工放射现象的可能性，这种放射现象的特征是用以射线轰击用咄硼和镁中的正电子或负电子。

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The electrons carry the negative charge, the protons carry the positive charge.That was all that was needed.

电子携带负电荷，而质子携带正电荷，这就是所有需要的东西。

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The total negative charge of the electrons is equal to the positive charge of the nucleus.

所有电子的负电荷,等于核的正电荷。

麻省理工公开课 - 固态化学导论课程节选

And there is this separation which is a balance of attractive forces because the chloride is net negative and the sodium is net positive, but both of them, regardless of net charge, have electrons.

这里有一个平衡,引力的平衡,由于氯离子带有负的净电荷,钠离子带有正的净电荷，但是它们两个，没有考虑净电荷，电子。

麻省理工公开课 - 固态化学导论课程节选

And since we have two bars that are together like this, once they're both loaded up with electrons there's going to be negative charges that repel, so the electrons will want to get as far away as possible, and they're on their slow way to doing that, to getting as far away from each other as possible.

因为我们有两个棒像这样在一起，一旦它们加载了电子,就会因为有负电荷而排斥，所以这些电子就会,互相离开的尽可能远，它们的这个过程很慢，离开的尽可能远。

麻省理工公开课 - 化学原理课程节选

The search for antimatter, that staple of science fiction, was the consequence of an equation about electrons which has two sets of solutions, one positive and one negative.

ECONOMIST: In praise of particle physics