Metal

A metal is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable, ductile and shiny. The meaning of the term "metal" differs for various communities (for example, astronomers call for convenience metals everything but hydrogen and helium. Many elements and compounds that are not normally classified as metals become metallic under high pressures.

Types of metal

 * Iron
 * Steel
 * Tin