Giant Metallic Lattice

Metallic structures are composed of a lattice of positive ions in a sea of delocalised valence electrons. Electrostatic attraction between the delocalised electrons and the positive ions holds the structure together.

High melting point - a lot of energy is required to break the bonds of strong electrostatic attraction.

Good electrical conductivity - electrons are mobile, so are free to carry a current.

Example of Metallic stucture.