So, as you go down a given group, you're becoming less, less electronegative, electronegative.

所以，当你进入一个给定的群体时，你的负电性会越来越小，负电性会越来越小。

Well, oxygen atoms are more electronegative than hydrogen.

好吧，氧原子比氢原子更具负电性。

The same thing does for CH4 with its tetrahedron of weakly electronegative hydrogens around a more strongly electronegative carbon.

CH4 也是如此，它的弱电负性氢四面体围绕着更强电负性的碳。

Fluorine as we could guess from its spot on the periodic table, love electrons. It is extremely electronegative.

我们可以从它在元素周期表上的位置猜到氟喜欢电子。 它具有极强的负电性。

So what, what are, based on this, what are going to be the most electronegative of all the atoms?

那么， 基于此，所有原子中电负性最强的是什么？

Well, oxygen atoms are more electronegative than hydrogen. The oxygen atom pulls harder on the molecule's electrons than the hydrogen does.

好吧，氧原子比氢原子更具负电性。氧原子比氢原子更能吸引分子的电子。

And so the three electronegative elements that you should remember for hydrogen bonding are fluorine, oxygen, and nitrogen.

因此，对于氢键，您应该记住的三种负电性元素是氟、氧和氮。

But in this situation, oxygen is more electronegative than hydrogen.

但在这种情况下，氧比氢更具负电性。

And we know that because oxygen is more electronegative, and we'll talk about the trends in a second.

我们知道这是因为氧气的电负性更强，我们稍后会讨论趋势。

So oxygen is more electronegative than carbon.

所以氧气比碳更具负电性。

Are we gonna get more or less electronegative as we move down?

当我们向下移动时，我们会得到或多或少的负电性吗？

If that's the case, the outer electrons spend enough extra time around the element that's more electronegative that chemists label the molecule polar.

如果是这样的话，外层电子会在电负性更强的元素周围花费足够多的时间， 以至于化学家将分子标记为极性。

And once again, if I think about these electrons here, which are between the oxygen and the hydrogen, I know oxygen's more electronegative than hydrogen.

再一次，如果我考虑这里的这些电子，它们位于氧和氢之间， 我知道氧比氢更具电负性。

And so chlorine is much more electronegative than sodium.

因此氯比钠更具负电性。

So this trend right here, when you go from the left to the right, your electronegativity, let me write this, your getting more electronegative.

所以这个趋势就在这里，当你从左到右时，你的电负性，让我写下这个，你的电负性越来越强。

Because oxygen is more electronegative, oxygen is going to pull those electrons in red closer to itself.

因为氧气更具电负性，所以氧气会将红色的电子拉近自身。

This time, carbon is more electronegative than lithium.

这一次，碳比锂更具电负性。

So if carbon is more electronegative than lithium, carbon's going to steal the two electrons in red.

因此， 如果碳比锂更具负电性，碳将以红色窃取两个电子。

And it turns out, it's so much more electronegative that it's no longer going to share electrons with sodium.

事实证明，它的电负性要大得多，以至于它不再与钠共享电子。

So it's important to understand something as simple as oxygen is more electronegative than carbon.

因此，重要的是要了解像氧比碳更具电负性这样简单的东西。