So let's say, for example, in a hydrogen atom.

比如说，在氢原子里。

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So today, we're going to start talking about the hydrogen atom.

今天我们将谈到氢原子。

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All right. So today we're going to finish up our discussion of the hydrogen atom.

好，今天我们要结束，关于氢原子问题的讨论。

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Hydroxyl is the combination of one hydrogen atom and one oxygen atom.

VOA: special.2009.09.30

Let's look at the energetics of one of those electrons crashing into a hydrogen atom inside the gas tube.

我们一起来考察一下,其中的一个电子的能量,在阴极射线管中,撞击到氢原子上。

麻省理工公开课 - 固态化学导论课程节选

So if I tell you that the energy for single hydrogen atom is negative 13 12 kilojoules per mole.

如果我告诉大家单个氢原子的能量,是负的，1312，千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

One hydrogen atom pairs with other free hydrogen atoms to create hydrogen gas, which is also captured and sold.

FORBES: Magazine Article

Bombard an ordinary hydrogen atom with microwaves of the right frequency and you will lift it out of its ground state by flipping the spin of its electron.

ECONOMIST: Are matter and antimatter truly opposites?

These are an amine group, an acid group (hence the name), a hydrogen atom, and a fourth chemical group that can be any one of 20 different clusters of atoms.

ECONOMIST: Folding stuff