We call the bonds between these atoms covalent bonds.

我们将这些原子之间的键称作共价键。

For example, take molecules, atoms held together by covalent bonds.

例如分子中原子有着共价的联系。

Normally, different molecules are connected by covalent chemical bonds between their atoms.

通常情况下，不同的分子通过原子间的共价化学键相连接。

SPNs do often contain conventional polymers that are held together by covalent bonds.

SPN通常含有由共价键连接在一起的普通聚合物。

Now, remember that in a covalent bond two electrons are shared, usually unequally, between atoms.

那么，通常，在共价键里，两个电子在原子之间被不平等共享。

That's because of the strength of their covalent bonds.

那是因为它们共价键的强度。

They're weaker than the forces that cause ionic or covalent bonds between atoms.

它们比引起原子间离子键或共价键的力弱。

So this is also a covalent bond.

所以这也是一种共价键。

This is crazy unstable. It's basically like having half of covalent bond dangling off the atom.

这是疯狂的不稳定。 这基本上就像有一半的共价键悬在原子上。

This is within the context of a covalent bond, how much electron affinity is there?

这是在共价键的范围内，有多少电子亲和力？

This is called a polar covalent bond.

这称为极性共价键。

Those crosslinks are generally also formed from covalent bonds, which are interactions where atoms share electrons and generally require a chemical reaction to make or break.

这些交联键通常也是由共价键形成，这些共价键是在原子共享电子的相互作用下形成，通常需要化学反应才能使之形成或断裂。

So a force within a molecule would be something like the covalent bond.

因此，分子内的力类似于共价键。

The atoms are all of the same element and they're all bonded together with covalent bonds, so what's the difference?

原子都是同一种元素， 它们都是用共价键结合在一起的，那有什么区别呢？

So I'm going to say there's a covalent bond to start with.

所以我要说首先是共价键。

So this is a polar covalent bond.

所以这是一个极性共价键。

Diamonds are hard because of their molecular structure, each carbon atom forms four covalent bonds with the atoms around it, which forms an exceptionally hard crystal structure.

金刚石坚硬是因为其分子结构，每个碳原子与相邻的原子形成四个共价键，从而形成极其坚硬的晶体结构。

Let's think about one of the most famous sets of covalent bonds, and that's what you see in a water molecule.

让我们想想最著名的一组共价键，这就是您在水分子中看到的。

So to start with, I'm going to pretend like there's a covalent bond between the sodium and the chlorine.

所以首先，我要假装钠和氯之间存在共价键。

So we could consider this to be a polar covalent bond.

因此，我们可以将其视为极性共价键。