Explain why Hydrogen bonding is the strongest of the

intermolecular forces, followed by dipole-dipole interactions

and then London dispersion forces.

Larger atoms tend to be more polarizable than smaller ones because their outer electrons are less tightly bound and are therefore more easily perturbed. Hydrogen bonds are especially strong dipole-dipole interactions between molecules that have hydrogen bonded to a highly electronegative atom, such as O, N, or F.