We call the bonds between these atoms covalent bonds.

我们将这些原子之间键称作共价键。

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

例如子中原子有着共价联系。

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

通常情况下，不子通过原子间共价化学键相连。

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

SPN通常含有由共价键连普通聚合物。

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

那么，通常，共价键里，两个电子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强度。

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

因此，子内力类似于共价键。

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

它们比引原子间离子键或共价键力弱。

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。

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

这是疯狂不稳定。 这基本上就像有半共价键悬原子上。

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

这是共价键范围内，有多少电子亲和力？

Lower than 1.7, in the polar covalent range.

低于1.7，极性共价范围内。

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共价键。

So this is also a covalent bond.

所以这也是种共价键。

So this is a polar covalent bond.

所以这是个极性共价键。

This is called a polar covalent bond.

这称为极性共价键。

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

原子都是种元素， 它们都是用共价键结合，那有什么区别呢？

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。

So the difference in electronegativity is somewhere between 1.5 and 2.1, between a polar covalent bond and an ionic bond.

所以电负性差异介于 1.5 和 2.1 之间，介于极性共价键和离子键之间。

So if we go back up here to carbon and lithium, here we treat it like a polar covalent bond.

因此， 如果我们回到碳和锂，这里我们将其视为极性共价键。