Classification and properties of aluminum

Aluminum is a metallic element, element symbol Al, is a silver white light metal. It's malleable. Commodities are usually made in rod, sheet, foil, powder, ribbon and filamentous form. In humid air, an oxide film can be formed to prevent metal corrosion. Aluminum powder burns violently in the air with heat, emitting a blinding white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, difficult to dissolve in water. Relative density 2.70. Melting point is 660 ℃. The boiling point of 2327 ℃. Aluminum is the most abundant metal element in the earth's crust, ranking third after oxygen and silicon. The development of aviation, construction and automobile industries requires the unique properties of aluminum and its alloys, which is greatly conducive to the production and application of this new metal aluminum. It is widely used.

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