List of good and bad conductor of electricity?

Good conductors conduct electrical current very easily because of their free electrons. Some common good conductors are copper, aluminum, gold, and silver.

Bad conductors (or insulators) oppose electrical current and make poor conductors. Some common insulators or bad conductors are glass, air, plastic, rubber, and wood.

Conductors have a very low resistance to electrical current while insulators or bad conductors have a very high resistance to electrical current.