Aluminium: chemical definition
Aluminum is a chemical element with the symbol Al, atomic number 13, relative atomic mass of 26.98 and a stable isotope: 27.
Aluminum is a silver white, soft metal.
Relative density: 2.71 g / cm ³
Melting point: 660 ° C
A thin, waterproof layer of aluminum oxide is formed in contact with air.
Mixed with other metals, aluminum is a very important building material. The main aluminum compounds are aluminum oxide, hydroxide, chloride, sulfate, silicate and acetate.
(Source: Encarta)
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