A crystal does not conduct electricity,even after melting.It is hard and brittle and melts at a very high temperature.What type of crystal is it?
A)an ionic crystal
B)an intermetallic (alloy)crystal
C)a network covalent crystal
D)a metallic crystal
E)a molecular crystal

Question

Quizplus · Accepted Answer

Network covalent crystals are characterized by strong covalent bonds throughout the crystal structure, which results in their high melting points and hardness. They do not conduct electricity because they do not have free electrons or ions that can move through the crystal. Examples of network covalent crystals include diamond, quartz, and silicon carbide.

A Crystal Does Not Conduct Electricity,even After Melting