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This cation is attracting the chloride next to it and it is repelling the sodium as the next nearest neighbor.
这一阳离子被邻近的氯离子所吸引,并排斥钠离子,因为这是其最邻近的离子。
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s2 2s2 2p6 3s2 3p5 Chlorine is 1s2, 2s2, 2p6, 3s2, 3p5.
氯的电子结构是。
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So, for example, for the chlorine case, we would say that the electron affinity for chlorine is actually positive 349 kilojoules per mole.
比如，以氯为例，我们可以说氯的电子亲和能,应该等于正的，349，千焦每摩尔。
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The ones that are most important in physiology are ones that only allow ions to go through: sodium, potassium, chloride, calcium, bicarbonate.
在生理学上这种,只能允许某种离子通过的通道十分重要,这些离子包括钠离子,钾离子,氯离子,钙离子和碳酸氢根离子
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We started with gaseous sodium to make gaseous sodium ion and gaseous atomic chlorine to make gaseous chloride ion through electron transfer.
我们从气态的钠开始,得到气态的钠离子,从气态的氯原子,通过电子转移得到氯离子。
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We've seen so far that we can have a neutral plus neutral sodium plus chlorine goes to cation plus anion.
到目前为止,我们得到了一个不带电的加一个不带电的,即钠加上氯，得到阳离子加阴离子。
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So just keep in mind when you do see the chlorine in these drugs, it's very different from the acid chloride.
因此只要记住当你在这些药物中发现氯的时候，它不会是酰氯就好了。
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And, we're going to look at what happens as the chloride ion moves from infinity in towards the positive ion.
然后我们要看一下,当氯离子从无限远处逐渐靠近,这个正离子会发生什么。
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So chlorine, if we talk about it in terms of electron affinity, we would be writing that we're actually gaining an electron here, and getting the ion, c l minus.
那么，氯，如果我们要讨论它的电子亲和能，我们会假设它真的得到了,一个电子而变成离子，负一价的氯。
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All right. So it's 7 that are in chlorine, it's the same as fluorine or any of the others in that row or in that group rather.
好，氯有七个，跟氟或者在那一列,的其它元素一样。
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So now, let's get a sodium here, and the chloride ion next to it to the point where they are touching.
所以，我们要有一个钠离子，和氯离子放在,相互接触的一个点上。
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So why don't you tell me what the formal charge should be on the sulfur atom of thionyl chloride?
那么请大家来告诉我亚硫酰氯中,的硫原子应该有多少形式电荷？
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actually our third, but the second one we're going to talk about in terms of formal charge, which is thionyl chloride.
实际上是第三个，但它是第二个,形式电荷的例子，也就是亚硫酰氯。
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When it breaks this bond, that chlorine atom, a free chlorine atom comes down and reacts, this is ozone, with the ozone in the upper atmosphere.
当它打破这个化学键，氯原子，一个自由的氯原子下来,和在大气层的上方的臭氧反应，这就是臭氧，在大气上层有臭氧。
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And so what you're going to end up with is, well, let's go over that. Here is sodium and chloride.
你将以之结尾，好吧，我们跳过那个，这是钠和氯。
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So, we can put our sulfur in the middle, and then it doesn't really matter how we draw the rest of it, where we put our c l's versus where we put our oxygen.
那么，我们可以把硫放在中间，然后把其它的原子画在哪里就不重要了，把两个氯原子与一个氧原子放在哪里都行。
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So again, we should be able to check all of our formal charges and make sure they add up to 0, which they do, and that makes sense, because we have a neutral atom in terms of thionyl chloride.
因此同样地，我们可以检验一下,我们所有的形式电荷是否正确,确保它们加起来等于零，而它们确实是这样，这是合理的，因为亚硫酰氯是一个中性原子。
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So, if we have energy that's released, would you say that the chlorine ion is more or less stable than the chlorine atom?
那么，如果我们放出了能量，你认为氯离子比氯原子,更稳定还是更不稳定呢？
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That is to say I can now reroute that sodium plus chlorine reaction and go a different way, but I still end up with the same change in energy.
也就是说，我可以重新定义一种,钠与氯的反应途径,从另一种途径来实现反应，但是能量的变化过程相同。
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And so you can imagine that if you mix these, if you take sodium and you mix it with chlorine you get sodium chloride.
如果将它们混合，以钠和氯反应为例,就会反应得到氯化钠。
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So, in other words, this c l minus is actually lower in energy than the reactants were.
也就是说，负一价氯离子,比原来的反应物的能量更低。
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It still has positive charge, and there is nothing saying another chloride could not stick to it.
它仍然具有正电荷，不能说明另外一个氯,不能固定在上面。
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He said look at sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, potassium.
他说，看，钠，镁，铝，硅，磷，硫磺，氯，钾。
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So, in terms of the c l atom, we need to talk about each atom individually.
对于氯原子，我们需要分开讨论这两个原子。
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How many bonding electrons does c l have? All right. Let's see, we've got a mixed response here, it turns out it has two bonding electrons.
氯有多少成键电子？好，让我们来看看，大家的回答不太一致，结果应该是两个成键电子。
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So, we'll put chlorine over here.
所以，我们把氯放在这。
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And there is this separation which is a balance of attractive forces because the chloride is net negative and the sodium is net positive, but both of them, regardless of net charge, have electrons.
这里有一个平衡,引力的平衡,由于氯离子带有负的净电荷,钠离子带有正的净电荷，但是它们两个，没有考虑净电荷，电子。
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So, what if we were to put the two of these in the same room?
所以如果我们,把钠和氯放一块会发生什么呢？
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And the last example that we're going to talk about is thionyl chloride, so it's s o c l 2. This is another good step forward, because now we actually have four different atoms in our molecule.
我们要讨论的最后一个例子,是氯化亚砜，就是硫，氧，氯，二，这又是一个进步，因为我们的分子中现在有四个不同的原子了。
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So I show that here, so in green, you have what's called a carboxcylic acid group, a c o o h, which gets converted by s o c l 2 to a c double bond o c l or an acid chloride.
我在这里用绿色表示，我们所说的羧酸族化合物，碳，氧，氧，氢，它被亚硫酰氯转化为,一个碳氧双键与碳氯单键组成的酰氯。
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