Metals have in Common

Metals have good electrical conductivity.  This means that they let electricity flow through them easily.  Nonmetallic materials resist the flow of electricity through them.  For this, nonmetals are good insulators, which can prevent movement of heat, energy, and even sound.  Electrical wires made of copper or aluminum are made because these elements are some of the best electrical conductors of all metals.

Maglev Train

A superconductor is an element at temperatures way below freezing and they lose all resistance to electrical flow.  Superconductors are used today in maglev trains that float above the rails on supermagnets.