Cracking the SAT Chemistry Subject Test

negative charge around an F, O, or N in a hydrogen bond.

Hydrogen bonds are stronger than any other form of intermolecular attraction,
yet they are far weaker than any covalent or ionic bond.

2)  Permanent   Dipole

Another type of intermolecular force arises between two polar molecules of an
atom where there is no hydrogen bonding. An example of this would be PF 3.