最轻的元素氢只有一个电子。

Hydrogen, which is the lightest element, has only one electron.

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元素氢占气体星云物质的百分之九十。

The element hydrogen comprises 90 % of the matter in gaseous nebulae.

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主要的差别是，相比于太阳，阿连德陨石缺失了大部分的挥发性元素，例如氢、碳、氧、氮和稀有气体。

The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun.

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Hydrogen gas it's in its most stable state, right at room temperature and pressure.

和常压下氢气是氢元素，最稳定的状态，这个小“0“

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And since carbon's electronegativity is higher than that of hydrogen, which you would expect from where carbon lies on the Periodic Table. Think about it.

碳的高于氢的,你也可以从碳在，元素周期表上的位置,判断出来，试想一下。

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A couple of other things about hydrogen: hydrogen also, like other elements, has isotopes and we already saw that in 1766, Cavendish isolated atomic hydrogen and enunciated some of its properties.

一些关于氢的东西：,氢气，就像其他元素一样，有同位素，人们在1766年就发现了这一点，卡文迪许分离出原子氢,并且阐述了它的一些性质。

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