Final answer:
A metal comprised of at least two elements, with one being a metal, is called a metal alloy. Alloys like steel, brass, and bronze have properties superior to pure metals and exhibit various types based on their atomic arrangement.
Step-by-step explanation:
A metal that consists of two or more elements, where at least one is a metal and the overall material retains metallic properties, is known as a metal alloy.
Alloys can be created through two general processes: substitutional, where various atoms replace each other in the crystal structure, or interstitial, where smaller atoms fit in between the larger atoms.
Examples of common alloys include steel, which is composed mainly of iron with carbon, manganese, and chromium, brass, a mixture of copper and zinc, and bronze, an alloy of copper and tin. These mixtures often have superior properties compared to pure metals, such as increased hardness or malleability.