Graphite is good conductor of electricity but diamond is non-conductor

1.	Graphite is good conductor of electricity but diamond is non-conductor because
Answer» diamond is HARD and graphite is soft graphite and diamond have different atomic configuration graphite is composed of positively CHARGED CARBON ions graphite has HEXAGONAL layer structure with mobile `pi-` electrons while diamond has continuous tetrahedral covalent structure with no free electrons Answer :D

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