Metals are good conductors, while nonmetals are poor conductors of electricity.
Give reason

Explanation

(1) The electrons in the outermost orbit of atoms of a metal are free to move throughout the metal.
(2) When a potential difference is applied between the ends of a metal wire, the movement of the electrons constitutes an electric current. Hence, metals are good conductors of electricity.
(3) Nonmetals involve covalent bonding ·and do not have free electrons like metals. Hence, nonmetals are poor conductors of electricity.