London Dispersion Forces: These are weak intermolecular forces arising from fluctuating dipoles in atoms or molecules.
Nonpolar Molecule: A type of molecule that does not have permanent or fluctuating dipoles because its electron cloud is symmetrically distributed.
Electronegativity:The ability of an atom to attract shared electrons towards itself in a chemical bond which can lead to formation of dipoles if it varies significantly between two atoms involved in bonding.