Why is copper used to make electrical wires?

Copper is widely used for electrical wiring primarily because it is an exceptionally good electrical conductor. In metals, electrical current is carried by free electrons that move between atoms; copper’s atomic structure allows these electrons to move with high mobility, resulting in low electrical resistance.1234

Because copper has low resistance, it is highly efficient at transporting electrical energy from one point to another without losing significant amounts of energy as heat. Additionally, copper is favored for industrial applications due to its high ductility, which allows it to be easily drawn into thin wires, and its relatively low cost compared to other highly conductive metals like silver.415