Metallic bond

Client: rupertharris

Location: Glossary

In metals, the valence electrons are not even approximately localised in discreet covalent bonds but are delocalised and interact with an indefinite number of atomic nuclei. This gives rise to both the opacity and lustre of metals and to the electrical conductivity. Note: metallic bonds are one of the three basic bonds linking atoms and molecules together, the other two are ionic and covalent bonds. See 'Atomic structure'.