A metallic bond is a type of chemical bond that occurs between metal atoms. In this bond, electrons are not bound to individual atoms but are instead shared freely among a lattice of metal ions. This "sea of electrons" allows metals to conduct electricity and heat efficiently, as the electrons can move easily throughout the structure. The strength of metallic bonds contributes to the unique properties of metals, such as malleability and ductility. Malleability allows metals to be shaped into thin sheets, while ductility enables them to be drawn into wires. These characteristics make metals like copper and aluminum valuable in various applications.