Metallic bonding holds together solic metals. This includes metal elements, such as iron and copper, as well as alloys like steel and brass.
Positive ions are fixed, whilst outer-shell electrons are delocalised and are shared between atoms of metal.
Giant Metallic Lattices
Metal elements exist as giant metallic lattices.
Properties of giant metallic lattices:
- The more delocalised electrons, the higher the melting point (because more electrons give the structure more strength)
- Metals are malleable and ductile--they can be shaped by hammer or by drawing them out
- They are good conductors of heat and electricity
However, these properties can be altered by mixing metals into alloys. For example, steel, a mixture of iron and carbon, is stronger than iron alone.