Metals are good conductors of electricity, because they have free electrons. These free electrons act as charge carriers in the metallic structure, allowing electric current to flow through the metal.
Metals are good conductors of electricity, because they allow electric charge to flow freely through them. According to BBC, metals contain a sea of delocalized electrons that are able to move throughout the metal structure. An applied potential difference causes these delocalized electrons to move together, thus an electric current flows through the metal.
An electric current can flow freely through a conductor. In metals, the outer electrons are loosely bound to the atom and are known as free electrons; these free electrons strongly repel each other, moving freely throughout the metallic structure.
According to School Science, free electrons are responsible for the ability of metals to conduct electricity. When an electric cell is connected across a metallic wire, this cloud of free electrons drifts through the wire as they are pushed from the negative terminal to the positive terminal. The drift velocity of this cloud of free electrons is 3 mm per second. The cloud of electrons moves at a much higher speed, causing an electric current to flow through the wire.