A conductor is a substance in which electrons can move freely from one atom to another.

An insulator is a substance in which electrons cannot move from one atom to another.

Common Conductors and Insulators

Good Conductors	Fair Conductors	Good Insulators (Non-conductors)
Silver	Carbon	Oil
Copper	Human body	Fur
Gold	Moist human skin	Silk
Aluminum	Acid solutions	Wool
Magnesium	Salt water	Rubber
Tungsten	Earth	Porcelain, glass
Nickel	Water vapour (in air)	Plastic
Mercury		Wood
Platinum		Paper
iron		Wax
		ebonite

List of Conductors and Insulators