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And in the case of the 3 s orbital, that's going to be equal to 11 . 5 times a nought.
对于３ｓ轨道，它等于１１．５ａ０．
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a0 This is equal to a sub nought for a hydrogen atom, and we remember that that's just our Bohr radius, which is . 5 2 9 angstroms.
它等于,我们记得，这就是波尔半径,也就是0，529埃，实际上。
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And this is given a special symbol A nought.
而我们给它一个符号A上面加个。
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And I just want to point out here in terms of things that you're responsible for, you should know that the most probable radius for a 1 s hydrogen atom is equal a nought.
在这里,我想要指出的是，你们要知道氢原子１ｓ轨道,最可能距离等于ａ０
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And we can simplify this expression as saying negative e squared over 4 pi, epsilon nought r squared. Epsilon nought is a constant, it's something you might see in physics as well.
也会遇到它,在这里，你可以就把它,理解为一个转换系数,我们需要做的。
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So this doesn't fall, for example, at 6 a nought, but that's a really good question.
比如这在６ａ０的时候不会掉下来，但这个问题很好。
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And the most probable one here is that a nought.
这个最可能的地方就是ａ０
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For the 2 s orbital, at 2 a nought, a0 so it's just 2 times that constant a nought, which is the Bohr radius.
也就是，乘以常数,玻尔半径，对于3s轨道。
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And what is discussed is that for a 1 s hydrogen atom, that falls at an a nought distance away from the nucleus.
我们讨论了对于氢原子１ｓ轨道，它的最可能半径在距离原子核ａ０处。
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And it turns out that for a 2 s orbital, that's equal to 6 times a nought.
对于２ｓ轨道，它等于６倍的ａ０
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And remember, a nought, that's just the Bohr radius, that's all we need to worry about.
记住ａ０就是波尔半径，我们要记住这点。
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9a0 And for the 3 s, 7 1a0 we have one at 1 . 9 a nought, and one at 7 . 1 a nought.
一个在，一个在，我们也可以确定。
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And basically, what that means is you can actually find an electron anywhere going away from the nucleus, a0 but you're most likely to find that you have the highest probability at a distance of a sub nought, or the Bohr radius.
它说明，虽然你可以,在任何地方,找到电子，但在距离为,或者波尔半径的地方,找到电子,的概率最大，我说过。
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s And what we find is we're going from about or exactly a 6 a nought here, to almost three times that when we're going from 2 s to 3 s.
从2s到,我们发现它，从6a0到大约增大了３倍。
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What we need to do is get rid of the Coulomb tag that we have - that's how we measure our electron charges - charge, and so we use this epsilon nought quite often, this permativity constant of a vacuum to make that conversion.
怎么量度电子电荷,所以我们会经常用到,这个epsilon，nought记号,这是真空中的介电常数,我们还要指出,这个介电常数。
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Yeah. This a sub nought.
嗯，这个a下标。
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In addition to that, we have that epsilon nought value, remember that's the permittivity constant in a vacuum, and basically that is what we use as a conversion factor to get from units. We don't want namely coulombs to units, we want that will allow us to cancel out in this equation.
这是电子的电荷，此外，我们有epsilon零，记住这是真空的介电常数，这是我们用来转换单位的转换常数,我们不想用库伦单位，我们希望这个可以在方程中约去它。
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And what he came out with when he did some calculations is that there's the radius that he could calculate was equal to this number a sub nought, which is what we call the Bohr radius, and it turns out that the Bohr radius happens to be the radius most probable for a hydrogen atom.
等于这个a0的值,我们叫它波尔半径，而,波尔半径恰好是,最容易，找到电子的地方，我们对波尔模型,不做过多的解释,这是因为。
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