Boiling point, viscosity, heat of sublimation,density
intermolecular force
This is an intermolecular force.
Boiling point is a property not a force; but a high boiling point indicate a strong intermolecular force.
Gravity!
Intermolecular attraction
The intermolecular force in Ar (argon) is London dispersion forces, which are the weakest type of intermolecular force. This force is caused by temporary fluctuations in electron distribution around the atom, leading to temporary dipoles.
Intramolecular forces are not intermolecular forces !
The intermolecular force in BF3 is London dispersion forces. This is because BF3 is a nonpolar molecule, so the only intermolecular force it experiences is the temporary weak attraction between temporary dipoles.
The physical state of matter with the least intermolecular force is a gas, where particles are far apart and move freely. Conversely, the state with the greatest intermolecular force is a solid, where particles are closely packed in a fixed arrangement. Liquids fall in between, with moderate intermolecular forces allowing for both some degree of particle movement and a defined shape.
Intermolecular forces shown by the dotted lines not by strong covalent bonds.
Hydrogen bonds
The strongest intermolecular force present in hydrogen bromide (HBr) is dipole-dipole interaction.