What are the properties of aluminum?

Aluminum is amphoteric and soluble in strong bases as well as dilute acids. Aluminum is a silver-white light metal. It's malleable. Commodities are often made into columns, rods, sheets, foils, powders, ribbons and filaments. In the humid air can form a layer of oxide film to prevent metal corrosion. Aluminum is an active metal. In dry air, a dense oxide film of about 50 angstroms (1 angstroms =0.1 nm) is formed immediately on the surface of aluminum, so that aluminum will not be further oxidized and can withstand water. But aluminum powder, when mixed with air, burns easily; Molten aluminum can react violently with water.

Aluminum powder treated with acid is heated in the air and burns violently, emitting a blinding white flame. Soluble in dilute sulfuric acid, dilute nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water, but can react slowly with hot water to produce aluminum hydroxide, relative density 2.70, elastic modulus 70Gpa, Poisson's ratio 0.33. Melting point is 660 ℃. The boiling point of 2327 ℃.

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