Because these things are unpaired, we have already seen how unpaired electrons play a role in the Stern-Gerlach experiment.
因为这些事物都是未成对的，我们已经发现在 Stern-Gerlach实验中，未成对电子扮演怎样一个角色了。
Three unpaired electrons in nitrogen.
有三个未成键电子在氮原子中。
So now what we have is four unpaired electrons.
现在我们有4个未配对电子。
At the end of the day you have some unpaired electrons.
今天的最后，你有些未成对电子。
But what we see we have is that we only have two unpaired electrons here.
但我们看到，我们只有两个未配对的电子。
Essentially what you have is bonds resulting from the pairing of unpaired electrons.
本质上就是由于，未配对电子配对导致的成键。
These unpaired electrons are the cause for the high chemical reactivity of free radicals.
由于这些不配对电子，这些分子或原子常具有高度的化学活性。
And again, we have the pairing of the unpaired electrons, and we have two orbitals coming together.
同样，我们有未配对电子的配对，我们有两个轨道结合。
Light hitting the proteins produces a pair of free radicals, highly reactive molecules with unpaired electrons.
光击中这种蛋白质产生一对游离的活性基，这是一种非常活跃的有着不成对的电子的分子。
So, electron promotion does not happen in terms of nitrogen, because it would not increased our number of unpaired electrons.
这里对于氮原子不会有电子激发，因为这不会增加，未配对电子的数目。
Their unpaired electrons make the atoms behave like tiny permanent magnets that align with and strengthen an applied magnetic field.
它们的未成对电子使原子成为小型的永磁体，它们沿外磁场排列，并因此增强外磁场。
Free radicals develop when atoms in the body's cells have unpaired electrons, which can lead to damage to different parts of the cell, including DNA.
自由基发生是当身体细胞中的原子有单电子，能导致包括DNA在内的细胞不同部分的破坏。
So, using our simple valence bond theory, what we would expect is that we want to pair up any unpaired electrons in methane with unpaired electrons from hydrogen and form bonds.
利用简单的价电子成键理论，我们预计，要把所有甲烷中没有配对的电子，和氢原子中没有配对的电子配对来形成键。
The agents that cause the damage are known as free radicals, which are unpaired molecules that are constantly trying to steal electrons from oxygen atoms.
造成细胞受损的媒介物就是自由基，它是具有不成对电子的分子团，它总是试图从其他氧化物那里抢夺电子。
The agents that cause the damage are known as free radicals, which are unpaired molecules that are constantly trying to steal electrons from oxygen atoms.
造成细胞受损的媒介物就是自由基，它是具有不成对电子的分子团，它总是试图从其他氧化物那里抢夺电子。
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