Question

Graphite is a good conductor of electricity and has shining appearance like metallic lustre.Why is it classified as a non metal?

Answer 1

The simple answer is that it is formed of carbon, which is a non-metallic element. Carbon happens to be a non-metallic element which has good conductivity in many forms and in the form of graphite, the molecular structure enhances its conductivity by creating the condition in which electrons are “free” to move within the bulk structure.

There are many non-metallic elements which form molecules which have good conductivity. Metallicity is not defined by conductivity alone, but by other physical properties of the element.

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Answer 2

the upper answer is correct from quora