Electron affinity is actually the ability of an atom, or we could also talk about an ion to gain electrons.

电子亲和能其实就是一个原子，或者我们也可以讨论离子获取电子的能力。

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The spatial distribution of that image represents the electron density around the atom.

图像的空间分布就代表了原子周围的电子密度。

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It means how much a certain atom actually wants to get an electron.

它意味着某一个原子，有多希望得到一个电子。

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So when we talk about orbitals in multi-electron atoms, they're actually lower in energy than the corresponding h atom orbitals.

它们的能量实际上,比对应的氢,原子轨道要低。

麻省理工公开课 - 化学原理课程节选

One of the main difference is is that when you're talking about multi-electron orbitals, they're actually smaller than the corresponding orbital for the hydrogen atom.

其中最主要的区别之一,是当你讨论多电子轨道时,它们实际上，要比对应的氢原子轨道,要小一些。

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This should make sense, because if an atom has a very high electron affinity, that means it's really happy taking an electron from another atom, or taking a free electron -- that that's very favorable.

这应该是合理的，因为如果一个原子有很高的电子亲和能，这意味着,它非常乐意从另外一个原子那里夺取一个电子，或者得到一个自由电子--这是非常利于发生的。

麻省理工公开课 - 化学原理课程节选

Pushing this electron out to its lonely periphery - and make a Rydberg atom - requires energy.

BBC: World first for strange molecule