adj. univalent ; monovalent ; monobasic
misc. monoacidic
卤原子在它们的价电子层含有七个电子,因此是一价的。
Halogen atoms contain seven electrons in their valence shell, and, consequently, are monovalent.
我们可以想象比较一下钾离子,与钠离子,它们都同样带有正一价的电荷。
So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.
我们可以用,X,来表示一个任意的原子或离子,因此可以写成,X,加一个电子等于负一价的。
We can write out what it is for any certain atom or ion x, X so it's just x plus an electron gives us x minus.
So we could think about comparing the potassium ion to a sodium ion. They have the same charge of plus one.
我们可以想象比较一下钾离子,与钠离子,它们都同样带有正一价的电荷。
And you would expect that that would be a much stabler compound because, instead of plus one attracting plus one, now you have plus two attracting minus two.
可以预见,这将会是更稳定的化合物,因为不再是一价正离子吸引一价负离子,而是二价正离子吸引二价负离子。
So chlorine, if we talk about it in terms of electron affinity, we would be writing that we're actually gaining an electron here, and getting the ion, c l minus.
那么,氯,如果我们要讨论它的电子亲和能,我们会假设它真的得到了,一个电子而变成离子,负一价的氯。
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