Question

Explain why metals are good conductors of electricity where as non-metals(other than graphite) are poor conductors of electricity.

Answer 1

hey buddy,



Before going to know the answer you have to familiar with the concepts of Conductor, Insulator and semi-conductor

Conductor:

In conductors electrons are transferred easily from one end to another end, so it can transfer electricity through it. In conductors there is no band gap between conduction band and valency band

eg: Iron, human body, copper, aluminium, water etc….

Insulator:

In Insulator electrons are not transferred from one end to another end, it doesn’t allows electricity through it. In Insulators there a huge gap between conduction band and valency band

eg: Wood, Rubber, Pure Water etc…

conclusion:

Metals comes under the category of Conductors, the electrons are loosely bounded with the nucleus, hence there is no gap between conduction band and valency band. so, electrons transfers easily through metals

Answer 2

To become conductor in solid phase require free electrons. Non-metals do not have any free electrons therefore unable to conduct heat and electricity.