Select the sentence that best describes why copper and some other metals are good conductors? 1) Copper and some other metals are good conductors because they have a high number of free electrons. 2) Copper and some other metals are good conductors because they have a low number of free electrons. 3) Copper and some other metals are good conductors because they have a high resistance to electric current. 4) Copper and some other metals are good conductors because they have a low resistance to electric current.
