These can be sulfate,nitrate, ammonia,sodium chloride and if these are small particles they can be dangerous because if they are inhaled they can reach the lungs."
VOA: standard.2010.04.16
And I want that to react to give me sodium chloride as a solid and crystal.
它们反应会得到氯化钠,氯化钠固体晶体。
A sodium chloride crystal is transparent to visible light.
氯化钠晶体对可见光透明。
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
Electron transfer, we cannot live, we die without sodium chloride.
电子转移了,没有氯化钠我们不能生存。
And thanks to Professor Hess, I can now say that the total energy delta H In other words, delta H formation of sodium chloride should be independent of paths.
感谢道盖斯教授,我们可以认为,这整体过程,氯化钠的化合能,与路径无关。
OK, sodium chloride works.
如氯化钠。
Sodium chloride is about 801 degrees C.
氯化钠的在801摄氏度。
We talked about this reaction here where we had chloride ion in the gas phase plus sodium ion in the gas phase.
我们在讨论这一个反应,我们有气相的氯原子,与气相的钠原子接触。
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。
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。
Well, I show you one sodium and one chloride.
我给你看一个钠,和一个氯。
We get another chloride and another sodium sticking to the chloride.
我们得到另外一个氯和另外一个钠,固定在氯上面。
So, for example, if I have a sodium ion over here, and I have a chloride ion over here, where the distance from center to center r I'm denoting as r, this is nucleus to nucleus separation.
所以,比如这有一个钠离子,和一个氯离子,它们中心与中心间的距离,我把它设为,这是原子核和原子和的间距。
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