The photograph shows a mixture of nuts and bolts that are made of either steel or aluminum. Which physical property is best used to separate the two types of substances in the mixture? A. boiling point B. particle density C. magnetic attraction D. particle size

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explanation:

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intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.