We call the bonds between these atoms covalent bonds.

我们将这些间的键称作共价键。

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

例如分中有着共价的联系。

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

通常情况下，不同的分通过间的共价化学键相连。

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

SPN通常含有由共价键连在一起的普通聚合物。

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

么，通常，在共价键里，两个电在间被不平等共享。

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

因为它们共价键的强度。

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

因此，分内的力类似于共价键。

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

它们比引起间离键或共价键的力弱。

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

所以我要说首先共价键。

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

这疯狂的不稳定。 这基本上就像有一半的共价键悬在上。

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

这在共价键的范围内，有多少电亲和力？

Lower than 1.7, in the polar covalent range.

低于1.7，在极性共价范围内。

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，我要假装钠和氯间存在共价键。

So this is also a covalent bond.

所以这也一种共价键。

So this is a polar covalent bond.

所以这一个极性共价键。

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?

都同一种元素， 它们都用共价键结合在一起的，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.

所以电负性的差异介于 1.5 和 2.1 间，介于极性共价键和离键间。

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，在这里我们将其视为极性共价键。