The solids which have metallic bond between their atoms are called metallic solids. In metallic bond, all the atoms lose their valence electrons. These electrons bound all the positive charge. The electrons present in the metallic solids are free. Electric current is produced due to the flow of electrons from higher potential to lower potential. Metallic solids are conductors. They can conduct electricity due to the presence of free electrons. When metallic solids are attached with a battery, electric current is passed through metallic solids.