Chemical properties of aluminum

Aluminum is an active metal that immediately forms a dense oxide film about 50 angstroms (1 angstrom=0.1 nanometers) thick on the surface of aluminum in dry air, preventing further oxidation and making it resistant to water; But when aluminum powder is mixed with air, it burns fiercely and emits a dazzling white flame; Molten aluminum can react violently with water; Aluminum is amphoteric and highly soluble in strong alkalis as well as in dilute acids. Insoluble in water, but can slowly react with hot water to produce Aluminium hydroxide