氧2
原声例句
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But, the oxygen has taken two electrons from the sulfur.
但是，氧从硫那里得到了2个电子。
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You start with O double minus, so that is oxygen plus two electrons.
你从氧二负离子，也就是氯元素带2个负电子。
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So if we're comparing the difference between these 2 now, what you'll notice is that in nitrogen we have all half-filled 2 p orbitals, and now, once we move into oxygen, we actually have to add 1 more electron into 1 of the 2 p orbitals.
那么如果我们来比较下它们两个有什么不同，你会发现氮的，2，p，轨道,都是半满的，现在，我们继续看一下氧，我们不得不在其中一个，2，p，轨道上,再放上一个电子。
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