When an atom shoots out a photon of light, it recoils like a gun.

原子发出光子时，会象枪一样地反冲。

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When an atom loses one or more electrons it acquires a positive charge and is known as a cation.

当原子失去一个或多个电子时，它就带正电荷并被称之为阳离子。

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As you understand that when an atom is split it creates essentially two parts and these two parts carry off a certain amount of energy.

当你们理解了，当一个原子被分离时，它，创造出了2个部分，而这2个部分，获得一定数量的能量。

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It's what it's called when an atom takes both electrons in the bond.

这就是它为什么叫这个名字,当一个原子从成键中得到两个电子。

麻省理工公开课 - 固态化学导论课程节选

But shielding is a good way to think about it, and actually, that's what we'll use in this class to sort of visualize what's happening when we have many electrons in an atom and they're shielding each other.

实际上，它也是我们将在课堂上用于,分类形象化的当我们有,很多电子在原子中,它们互相屏蔽时会发生些什么,屏蔽是被使用的名词。

麻省理工公开课 - 化学原理课程节选

So when we talk about formal charge, basically formal charge is the measure of the extent to which an individual atom within your molecule has either gained or lost an electron.

说到形式电荷，基本上形式电荷就是,单个原子在形成分子之后,是得到了电子还是失去了电子的一种量度。

麻省理工公开课 - 化学原理课程节选

When struck by light, the electrons in an atom of silver vibrate in a way that causes them to radiate small amounts of light themselves.

ECONOMIST: Solar energy

Since 2003, when Iran's nuclear program was first disclosed, the greater Middle East has seen an explosion of interest in the atom.

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He signed the letter to Franklin Roosevelt warning that it may be possible to build an atom bomb, and the letters of his famed equation relating energy to mass hover in our minds when we picture the resulting mushroom cloud.

NPR: Einstein: Relatively Speaking, a Complicated Life