Conductivity of Electricity- When a metal is a solid or liquid, its able to conduct electricity. The delocalized electrons in the metal have the freedom to move in the solid lattice. They act as a charge carriers in the conduction of electricity.
Melting Points- Metals have high melting and boiling points because of the great strength of metallic bonding. The strength depends on the number of electrons in delocalized sea of electrons and the packing arrangement of a metal atoms.