Question

The non-metallic substance which is a good conductor of electricity.

Hint:

Graphite’s electrical conductivity is why it is used in applications like the electrodes in batteries and electric arc furnaces, and as the "lead" in pencils.

Answer 1

Graphite is an allotrope (a different physical form) of the non-metal carbon. It has a unique layered structure where carbon atoms are arranged in hexagonal rings. Within these layers, there are delocalized electrons that are free to move, which makes graphite a good conductor of electricity, unlike most other non-metals.