The type of bonding that would be expected for brass (a copper–zinc alloy) would be metallic bonding. It is an type of bonding between atoms that is a result of the attraction force between the valence electrons and the atoms. It involves sharing of the electrons between positive ions wherein the electrons present serve as a binding particle resulting to a definite structure of the substance. The electrons in this substance are able to move freely within the structure. This type of bonding occurs only in metal-metal bonding. Most obvious example would be the alloys such as brass, bronze, steel, pewter, solder and wrought iron.