Intermolecular Forces In the liquid and sold states, molecules are held together by attractions called intermolecular forces. There are several types of intermolecular forces London dispersion forces, found in all substances, result from the motion of electr These work to attract both polar and nonpolar molecules to one another via instantaneous dipole moments Dipole dipole forces aise from molecular moments lon dipole forces result from the interaction of an ion and a molecular dipole. Hydrogen bond forces result from the attraction of a atom bonded to a small highly electronegative atom (N, o and F and the unshared electron pairs of another electronegative atom Physical properties such as boiling point, mehing point, vapor pressure, and surface tension are al affected by the strengh of the intermolecular forces within a substance Part A What happens to these physical properties as the strength of intermolecular forces increases? Drag each item to the appropriate bin. Reset Help