Metals are elements that generally have good electrical and thermal conductivity.
Many metals have high strength, high stiffness, and have good ductility.
Some metals, such as iron, cobalt and nickel are magnetic. At extremely low temperatures, some metals and intermetallic compounds become superconductors . Examples of pure metals include copper in electrical wires and aluminum in cooking foil and beverage cans. Metal Alloys contain more than one metallic element. Their properties can be changed by changing the elements present in the alloy.