This is called a polar covalent bond.

这称为极性共价键。

So this is a polar covalent bond.

所以这是一个极性共价键。

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。

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 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，在这里我们将其视为极性共价键。

Now here, I'm treating this bond as a polar covalent bond.

现在在这里，我将这种键视为极性共价键。

And that's enough to have a polar covalent bond.

这足以形成极性共价键。

So somewhere in between there must be the difference between non-polar covalent bond and a polar covalent bond.

因此，介于两者之间的某个地方必须存在非极性共价键和极性共价键之间的区别。

And so we can see that if your difference in electronegativity is 1, it's considered to be a polar covalent bond.

所以我们可以看到，如果你的电负性差异为 1，则它被认为是极性共价键。

These molecules have polar bonds, but the molecules themselves are not polar because the symmetry of the bonds cancels out the asymmetry of the charges.

这些分子具有极性键，但分子本身不是极性的， 因为键的对称性抵消了电荷的不对称性。

So if the difference in electronegativity is greater than 0.5, you can go ahead and consider it to be mostly a polar covalent bond.

所以如果电负性的差异大于 0.5，你可以继续认为它主要是极性共价键。