Which of the following types of crystalline solids is hard and brittle,has a high melting point,and conducts electricity only when melted?

Question

Quizplus · Accepted Answer

Ionic solids are hard and brittle due to their rigid lattice structure, have high melting points due to strong electrostatic attractions between ions, and conduct electricity only when melted or dissolved in water due to the movement of ions. Metallic solids are also hard with high melting points, but they are malleable and can conduct electricity in both solid and liquid states. Molecular solids have low melting points and do not conduct electricity in any state.

Which of the Following Types of Crystalline Solids Is Hard