Final answer:
The relatively high melting points of ionic compounds can be explained by the electrostatic attraction between ions in the ionic bonding model.
Step-by-step explanation:
The relatively high melting points of ionic compounds can be explained by the electrostatic attraction between ions in the ionic bonding model. Ionic bonds are formed when there is a large difference in electronegativity between atoms, resulting in the transfer of electrons and the formation of oppositely charged ions. These ions are held together in a crystal lattice structure by the electrostatic force of attraction. This force is much stronger than weak intermolecular forces found in covalent compounds and is responsible for the high melting points of ionic compounds.