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So if we're talking about the third period, that starts with sodium and it goes all the way up to argon.
所以如果我们谈论第3个周期，它从钠开始,一直到氩。
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It could be aluminum, silicone, phosphorous, sulfur, c hlorine or argon.
答案可能是铝，硅，磷，硫,氯或者氩。
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If it could gain one more electron, then chlorine would be iso-electronic with argon.
如果它能得到另一个电子，它就能和氩一样是电绝缘。
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So if you have a gas of argon atoms, 5/3 you know what gamma is.
于是我们知道，氩气的γ值是。
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Versus looking at, for example, helium or neon or argon, these are all inert gases, inert meaning essentially do not react, those were grouped together in the periodic table.
相反，他发现氦，氖，氩，都是惰性气体，惰性的意思是基本不参与化学反应，因此把它们放在周期表中的同一类里。
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So, as an example, let's take argon, I've written up the electron configuration here, and let's think about what some of the similarities might be between wave functions in argon and wave functions for hydrogen.
所以作为一个例子我们来看看氩，我已经把它的电子构型写在这里，我们来考虑氩和,氢波函数之间的,一些相似性。
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What is the pull from the nucleus from argon going to be equal to?
氩的来自原子核的吸引力,是多少呢？
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You've got an electron acceptor with the powerful urge to become argon like.
你有一个电子接收者,它有巨大动力要变成和氩一样的结构。
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Let's consider again an s orbital for argon, so let's say we're looking at the 1 s orbital for argon.
我们再考虑一次氩的s轨道，所以我们说我们在看氩的1s轨道。
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Chloride minus. Isoelectronic with argon.
氯离子，与氩的电子数相同。
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We could use argon ion.
我们可以用氩离子。
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So here we're talking about v plus 1, so if we were to write it just for the neutral electron itself, we would find that the electron configuration is argon, that's the filled shell in front of it.
这里我们要分析的是正一价的钒离子，因此，我们先写出中性原子的电子排布，可以发现，其原子实是氩原子的电子排布，这些壳层已经被占满了。
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So the correct answer for titanium plus two Ar3d2 is going to be argon 3 d 2, whereas if we did not rearrange our order here 4s2 we might have been tempted to write as 4 s 2 so keep that in mind when you're doing the positive ions of corresponding atoms.
所以正2价钛离子,的正确答案是，然而如果我们不重新安排顺序,我们可能会写出2,所以请记住,它当你们在解关于原子,的正离子的时候。
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We can go all the way down -- magnesium aluminum, all the way to this noble gas, 3s23p6 argon, which would be n e and then 3 s 2, 3 p 6.
我们可以继续，镁，铝,一直到惰性气体，氩它是Ne然后。
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So, for example, if we needed to figure out the electron configuration for titanium, 4s2 it would just be argon then 4 s 2, 3d2 and then we would fill in the 3 d 2.
所以举个例子,如果我们需要解出钛的电子构型，它会是Ar然后，然后我们填充。
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So for example, if you know how to draw an s orbital for a hydrogen atom, then you already know how to draw the shape of an s orbital or a p orbital for argon.
举个例子，如果你们知道如果画,氢原子的s轨道，那么你们已经知道如何去,画氩的s轨道和p轨道的形状。
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So, for example, if we look at the 2 s orbital of argon, it's going to have the same amount of nodes and the same type of nodes that the 2 s orbital for hydrogen has.
所以举例来说，如果我们看氩的2s轨道，它有相同数量的节数,和相同类型的节点,对于氢的2s轨道。
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So what we end up with is one radial node for the 2 s orbital of hydrogen, and we can apply that for argon or any other multi-electron atom here, we also have one radial node for the 2 s orbital of argon.
那意味着它们都是径向节点,所以我们得出的结论是，氢的2s轨道是1个径向节点,我们可以将它应用，到氩或者任意一个多电子原子,对于氩的2s轨道。
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