Does He gas or F2 gas have the stronger intermolecular forces? why?

Indicate what the strongest intermolecular interaction (dispersion forces, dipole-dipole interaction, hydrogen bonding) would be for each molecule as a pure substance.

The types of intermolecular forces in a substance are identical whether it is a solid, a liquid,or a gas. Why then does a substance change phase from a gas to a liquid or to a solid?Explain using the intermolecular forces present in a water molecule. (you might want torefer to unit 2)

Draw the lewis structure of methane and define all the intermolecular forces present in the molecule.