So in a single sodium chloride molecule, we have one ionic bond. Now, what happens is, because we have two different atoms, and because one of these atoms is so much more electronegative than the other atom, because chloride is so much more electronegative, it will pull that electron completely onto that chloride atom. And so we basically have no sharing of electrons because that same electron ends up entirely on that chloride. And so the chloride develops a full negative charge and a sodium develops a full positive charge because it becomes deficient, it doesn't contain that electron. So because now we have the separation of two full charges, we're going to have an electric force that will exist between these two full charges. And so this is what an ionic bond is.