Question

Why is sodium a good conductor of electricity?

Answer 1

Sodium is a good conductor of electricity because it is a metal and metals always are good conductors of electricity.

Answer 2

Sodium is a metal. Metals are atoms in a sea of electrons. These electrons can move and conduct electricity. The atoms in the metal are actually cations or positivity charged. The sea of electrons is a large molecular orbital where the negative charges balance the positive charge of the atoms but allow electrons to flow between atoms or conduct electricity.