Question

Why do covalent compounds have low melting and boiling points?

Answer 1

Covalent compounds haveweak forces of attraction between the binding molecules.Thus less energy is required to break the force of bonding.Therefore covalent compounds have low melting and boiling point.

Answer 2

Covalent compounds are weaker then ionic bonds because they form by sharing electrons. So they have low melting and low boiling points.