Why are metals good electrical conductors?

Why are metals good electrical conductors?

• A. They have free electrons.
• B. They have high resistance.
• C. They contain insulators.
• D. They are non-metals.

Answer: (A)

Metals conduct electricity well because their outer electrons are not bound to specific atoms. In a metal, many electrons become delocalized and form a sea of free charge carriers that can move through the lattice. When a voltage is applied, these free electrons respond to the electric field and drift, producing an electric current. Their high mobility and the large number of charge carriers make it easy for charge to flow, giving metals their low resistance. Insulators don’t have these mobile electrons, and many non-metals are poor conductors, so the presence of free, mobile electrons is the key reason.

Metals conduct electricity well because their outer electrons are not bound to specific atoms. In a metal, many electrons become delocalized and form a sea of free charge carriers that can move through the lattice. When a voltage is applied, these free electrons respond to the electric field and drift, producing an electric current. Their high mobility and the large number of charge carriers make it easy for charge to flow, giving metals their low resistance. Insulators don’t have these mobile electrons, and many non-metals are poor conductors, so the presence of free, mobile electrons is the key reason.