This document provides information about aluminum, copper, and nickel. It discusses their physical and chemical properties, including atomic number, density, and melting/boiling points. It also describes their common ores and uses in alloys. Aluminum is a reactive metal used in alloys for lightweight materials. Copper is highly conductive and used in wiring and alloys like brass. Nickel is corrosion resistant and commonly used in stainless steel and other alloys.