Now let's look at polar covalent bonds. Polar covalent bond simply means there will be an unequal distribution of charge. And let's see why. Well, suppose we have an atom and a second atom that have different number of protons in their nuclei. Suppose we have a larger atom with a larger number of protons than this atom. And what that basically means, because of coulomb law, because the charge will be greater for this nucleus than for this nucleus, the force that these electrons feel due to this nucleus will be larger than due to this nucleus.