Which allotrope of carbon is a good conductor of electricity and possesses a layered structure?
Correct: C
A) Diamond is an excellent electrical insulator and has a rigid 3D tetrahedral structure. B) Fullerene (e.g., C60) has a spherical cage-like structure and is a semiconductor. C) Graphite is a good conductor of electricity due to the presence of delocalized electrons in its layered hexagonal structure. The layers can slide over each other, making it soft and a good lubricant. D) Charcoal is an amorphous form of carbon and is a poor conductor of electricity.