1. Any of a class of elements that generally are solid at ordinary temperatures, have a grayish color and a shiny surface, and will conduct heat and electricity.

In a pure electrolytic solution, a metal will form positive ions.

Metals constitute about three-fourths of the known elements and can form alloys with each other and with nonmetals.

Common metals include copper, gold, silver, tin, iron, lead, aluminum, and magnesium.

2. An alloy is a mixture composed of the previously listed-common metals.