I thought, well, maybe we can now go to the Periodic Table and figure out what is going on there.

那么接下来，我们可以讲元素周期表了吧,让我们看一下在这儿我们又会遇到什么问题。

麻省理工公开课 - 固态化学导论课程节选

It would go out of his sight, and then it would pass again going back down to the table.

会飘落到上面，时隐时现的，“

耶鲁公开课 - 1945年后的美国小说课程节选

So, if we look on the periodic table, comparing, for example, s to o, if we have s it's below o, what happens to ionization energy as we go down a table?

那么，如果我们看周期表上，比较，比如，硫和氧，硫在氧下面，当我们沿着表向下看的时候,电离能是怎么变化的？

麻省理工公开课 - 化学原理课程节选

So here we're talking about how food comes to the table. what happens just materializing it into fish sticks. We didn't just go out to the river and poured out the fish sticks.

因此在这我们将探讨食物的制作过程,什么让鱼变成冻鱼条,并不是可以去河里,把冻鱼条直接倒出来。

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And you can find these compressibility factors in tables. If you want to know the compressibility factors for water, for steam, at a certain pressure and temperature, you go to a table and you find it.

各种气体的压缩系数,想知道水或者水蒸气,在某个温度和压强下的，压缩系数，查表就行了，这是实际气体状态方程的。

麻省理工公开课 - 热力学与动力学课程节选

Anyway, if you go to your Periodic Table you will find that on the one side you can get what is called the enthalpy of atomization.

如果你看元素周期表,你会在这一侧发现,这是原子化焓。

麻省理工公开课 - 固态化学导论课程节选

We know that ionization energy is going to increase as we go across the periodic table, so that means carbon has a lower ionization energy than nitrogen which is right next to us.

我们知道电离能会随着周期表,向右而逐渐变大，因此碳的电离能比旁边的氮要低一些,那么就像我说的。

麻省理工公开课 - 化学原理课程节选

while we read it, I will go through the pages together, they all sit around the table, look at the pictures and talk to her.

当我们读这本书的时候，我会一点一点地讲，孩子们都做在桌边，看着图片，跟她说话。

麻省理工公开课 - 媒体、教育、市场课程节选

Depending on what kind of chemistry you go in to, you might accidentally memorize parts of the table, which is fine, but what you really want to know how to do is know how to use the periodic table.

取决于你今后从事哪个方向的化学研究，你可能会不经意地记住周期表的某一部分，这就够了，但是要注意,你真正需要知道的是如何使用元素周期表。

麻省理工公开课 - 化学原理课程节选

So specifically, what we're asking here is as we go across the periodic table, we want to consider which has the smaller ionization energy.

具体地说，我们这里要问的是,从周期表来看，你认为,哪一个元素的电离能更低。

麻省理工公开课 - 化学原理课程节选

The one problem that we run into is as we go to more and more atoms on the table, as we add on electrons, the Schrodinger equation is going to get more complicated.

我们将会遇到的一个问题,是当我们处理周期表中越来越多的原子时，当我们增加了电子，薛定谔方程,变得愈加复杂。

麻省理工公开课 - 化学原理课程节选

And that's all that's big enough to pass through or small enough to pass through. And if we go up even just one row on the periodic table to potassium, what we actually see is now that it's going to be too large, and, in fact, a potassium solvated with one water molecule won't go through our channel.

就是这样刚好大到它通过,或者说刚好小到它通过,即使我们再沿着周期表往下走仅仅一行到钾离子，我们看到的就将是它的个头太大了，实际上，溶解于一个水分子的单个钾离子,不能穿过我们的通道。

麻省理工公开课 - 化学原理课程节选

And then this second term, if we go to the Periodic Table, 2 we will find that the value here for hydrogen is 2.2 98 and the value for fluorine is 3.98.

再算上第二个条件，翻看元素周期表，我们查处H，F电负性分别为2,2。2，3。

麻省理工公开课 - 固态化学导论课程节选

Similarly we see as we go down the table, so as we're going from one row to the next row, so, for example, between helium and lithium, we see a drop; the same with neon to sodium, we see a drop here.

同样地，我们来看看沿着周期表往下走，当我们从一行到下一行时，比如，从氦到锂，我们看到了一个下落;,从氖到钠也一样，我们看到这里有个下落。

麻省理工公开课 - 化学原理课程节选

So this is not even thinking about the other electron shielding, just if we think of the fact, all we need to think about is that the effect of going to a further away n n as we go down the table.

到现在我们甚至还没有考虑,其它电子的屏蔽效果，即使我们要考虑这个因素，我们需要考虑也就是,沿着周期表的某一列往下走，距离会逐渐变远,将起最重要的作用，actually，dominates,这一结果所产生的影响。

麻省理工公开课 - 化学原理课程节选

Well, you go look in your table So, if I had to guess, 4 what would you guess the bond energy would be in HF?

在你的表格里也有,如果让我们来猜猜，你会猜HF的键能是多少呢？

麻省理工公开课 - 固态化学导论课程节选