which type of intermolecular attraction exists for all molecules
London dispersion forces and dipole-dipole forces are. collectively known as van der Waals forces. Molecules can have any mix of these three kinds. of intermolecular forces, but all substances at least have London dispersion forces. London dispersion forces exist for all substances, whether composed of polar or nonpolar. molecules. They arise from the formation of temporary, instantaneous polarities across a. molecule from circulations of electrons.