The result is that at a given instant, the e- distribution may be uneven, causing the atom to lose its spherical shape for short periods of time creating a temporary dipole. This temporary dipole can cause the formation of a temporary dipole on a neighboring atom. A dipole that is created where there was no dipole originally is called an induced dipole. These temporary dipoles can be induced throughout the substance. The force of attraction between induced dipoles is called a dispersion force.
Dispersion forces are present in all molecular subs.
Are the only forces between noble gases.