In any atom, the number of protons is equal to the number of electrons, and hence it is electrically neutral.

任何原子的质子数量与电子数量相等，因此是电中性的。

youdao

So what that means is that we're limited in any atom to having two electrons per orbital, right, because for any orbital we can either have a spin up electron, a spin down electron, or both.

这意味着在一个原子内,每个轨道上可以有两个电子，对吧，因为对任何轨道,我们可以有自旋向上或者自选向下或者两者都有。

youdao

This HTTP request contains a query with one or more input parameters; the server replies to the query with an Atom feed, suitable for parsing in any XML-aware client.

该HTTP请求包含一个带有一个或多个输入参数的查询；服务器用一个Atom提要响应此查询，Atom提要适合于在任何支持XML的客户端进行解析。

youdao

So what that means is that we're limited in any atom to having two electrons per orbital, right, because for any orbital we can either have a spin up electron, a spin down electron, or both.

这意味着在一个原子内,每个轨道上可以有两个电子，对吧，因为对任何轨道,我们可以有自旋向上或者自选向下或者两者都有。

麻省理工公开课 - 化学原理课程节选

So, you can see how this can directly give us different ionization energies for any atom that we're interested in studying.

那么，大家可以理解,这种技术如何直接给出我们所要研究的,任何一种原子的所有不同的电离能。

麻省理工公开课 - 化学原理课程节选

But, in fact, we can also talk about the ionization energy of different states of the hydrogen atom or of any atom.

但实际上我们也可以讨论氢原子,或者其它任何原子的其它能级的电离能。

麻省理工公开课 - 化学原理课程节选