Metallic bonding is the electrostatic attraction between delocalised electrons and the positive metal ions
Structure of a metallic element:
atoms are packed closely together in layers to form a giant lattice
Metal atoms have 1, 2 or 3 electrons in their outer shell.
These outer electrons are lost from each atom and become free to move randomly throughout the metal. This leaves a sea of delocalised electrons which move randomly in all directions.
Metallic bonding is so strong that metals have a high melting and boiling points
