What is the aluminum? Aluminum have what attribute?

Cast aluminium, aluminium magnesium alloy.
Burnish light aluminium product, no matter you with fine sand paper, in air will be oxidized, luster degree decline gradually. Method can be in liquid homogeneous oxidation, forming a layer of alumina film. After processing or hit a layer of wax or varnish protected.
Silver luster metal, density 2.702 g/cubic centimeter, melting point 660.37 ℃, boiling point 2467 ℃. Valence + 3. With good thermal conductivity, electrical conductivity, and ductility, ionization energy 5.986 electron volts, although is called active metal, but in the air the surface can form a layer of dense oxidation film, not with oxygen, water continue to function. At high temperatures can react with oxygen, release a lot of heat, with such high heat of reaction, aluminum can from other oxide in displacement metal (aluminum heat method). Under high temperature aluminum are with nonmetal reaction, can be soluble in acid or alkali release hydrogen. To water, sulfide, concentrated sulfuric acid, any concentration of acetic acid, as well as all of organic acids are of no effect.
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