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I am doing this for plus one minus one like sodium chloride.
我正在这样做,因为就像氯化钠那样一正一负。
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One minus one-half plus one-third, it is all there.
-1/2+1/3，这就是它。
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R/Cv OK, so that means that this is really instead of -1 R over Cv. it's really gamma minus one.
现在,变成了γ
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And in terms of radial nodes, we have 2 minus 1 minus 0, so what we have is one radial node.
对于径向节点，我们有２减去１减去０,所以有一个径向节点。
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Because if b was odd, then b minus one is even which means on the next step, I can cut the problem in half again.
这意味着我在下一步里解决的问题,规模要小了一半，好，课堂材料的第三题。
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The formula is-- I could write it this way: price equals one hundred minus this.
公式是,可以这样写,价格等于100减去这些
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No, here both are plus, but this one has a minus.
不对,这里都是加号,但这有个负号
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e The charge on the anion times minus e, so there is the minus e squared, 0R0 and divided by 4 pi epsilon zero r naught, because now I am evaluating this function at r naught, one minus one over n where n is the Born exponent.
阴离子的电荷乘以，因此会有-e的频繁，除以4πε,因为现在我用r圈评估这个函数，1-1/n，n是波恩指数。
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Sometimes you see this written when you see p orbitals, one is written as plus, one is written in minus.
有时候你们看ｐ轨道时会看到，一个写成正号一个写成负号。
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One over two squared minus one over n squared 3 4 5 where n takes values three, four, five, six.
除以，2，的平方再减去1除以n的平方,将n赋值为。
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Yup, so one total node, 2 minus 1 is 1, and that means since l is equal to 1, we have one angular nodes, and that leaves us with how many radial nodes?
一个节点，２减去１等于１,因为ｌ等于１,我们有一个角向节点，那剩下径向节点有多少个呢？
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So this one is spin-up plus a half, this is spin-down minus a half.
所以自旋向上是正二分之一，而自旋向下是负二分之一。
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If I look for, say, minus 1, you might go, gee, wait a minute, if I was just doing linear search, I would've known right away that minus one wasn't in this list, because it's sorted and it's smaller than the first elements.
如果我要查找-1，你可能要怒了，呵呵，等一等，如果我用的是线性查找，我不会知道-1不在这个列表中,但是列表是排好序的,1又比第一个元素小。
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Effectively, you get interest from this because it's sold at a discount, so the price that you pay is equal to one hundred minus the discount.
实际上,你仍然从中获得利息,因为债券是打折出售的,所以买入价,等于一百减去折扣
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PROFESSOR: And I didn't write up there but it is one, 1 and we can see that it's 1, 2 because it's 1/2 of 2, 4 minus 2, so 1/2 of 2, the bonding order is going to be equal to one.
教授：我没有写出来，但是是1，我们可以看到为什么是，因为它等于1/2的2，4减去，所以1/2的2，键序等于1。
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So what this says is the efficiency of any reversible engine T1 has to be one minus T2 over T1.
这就是说,任何可逆热机的效率都是,负T2除以。
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Whereas for fluorine, fluorine is smaller than f minus is the one that's the outer shell shown here.
而对于氟来说，氟原子更小,与外部壳层在这的负一价氟离子相比。
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1/2 And we have the spin quantum number 2 as plus 1/2 for electron one, -1/2 and minus 1/2 for the electron two.
我们有自旋量子数,对于电子，我们有自旋量子数。
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Then minus 1/2 of 2, because we only have one bond or 2 electrons in a bond.
然后减去二的二分之一，因为我们只有一个键，一个键就是两个电子。
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He said that is going to equal one minus the exponential.
一根共价键中,离子百分数等于。
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T1 Anyway T2 over T1 is equal to V2 over V3 to the power gamma minus one.
总之，T2除以3,等于V2除以V3的伽马减一次方。
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Yup, I heard one, so 2 minus 1, one total node.
嗯，我听到有人说１个，２减去１，１个节点。
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So that is one plus against one minus.
因此这是一正对一负。
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T1 So this is negative T2 over T1 over negative one minus T2 over T1.
除以负1减T2除以1,我可以把这些消掉。
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One plus this, T1 but this is the same as one minus T2 over T1.
加这个，等于1减T2除以。
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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。
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And that makes sense, too, because the positive three pulling on minus one has a tighter binding energy than positive one pulling on minus one.
而这也是有意义的，因为+3和-1的相互吸引,产生了比+1和-1的吸引,更强的能量。
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It would be nine times less. That is to say minus nine is less than minus one.
它比9倍更少，那就是说,9比-1小。
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You have square root of minus one for something else.
你得到了某个负数的平方根。
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So if we have total +2 and complete shielding -1 where that can actually negate a full positive charge, because remember our nucleus is plus 2, +1 one of the electrons is minus 1, so if it totally blocks it, all we would have left from the nucleus is an effective charge of plus 1.
抵消一个完全的正电荷,因为记住我们的原子核是,其中一个电子是,所以如果它完全挡住了它，我们从原子核中留下的，全部有效电荷就是，所以，在我们的第一个例子中,我们的第一种极端情况。
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