Zinc is also used in electric batteries. Plants and animals require zinc for normal growth and healing. Zinc is also a component of the hormone insulin. For example, brass is an alloy of copper and zinc. Bronze is copper, tin, and zinc.
Nickel silver is copper, nickel, and zinc.
Since 1982, United States pennies have been made from a predominantly zinc alloy coated with a thin layer of copper. Once a thin layer of this coating forms, air cannot tarnish the zinc below it. White, powdery zinc oxide is used in making cosmetics, plastics, rubber, skin ointments, and soaps. It is also used as a pigment in paints and inks. It is used on luminous dials for clocks and to coat the inside of television screens and fluorescent lamps.