Metal is any of a large group of chemical elements that includes copper, gold, iron, lead, silver, tin, and other elements that share similar qualities. Nearly 80 percent of the known elements are metals. Metals make up much of Earth. They are important in all aspects of construction and manufacturing. Manufacturers use metals to make tools, utensils, jewelry, and a wide variety of machinery. Compounds that contain metals are used in drugs, batteries, and many other products.