What are the properties of aluminum? The higher 3 will!

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Aluminum occurs mainly in nature as bauxite, a hydrated bauxite containing impurities. Aluminum is the third most abundant element in the earth's crust after oxygen and silicon.

Aluminum is a silver-white shiny metal with good ductility and conductivity. It can replace copper in electrical equipment such as wires, high-voltage cables and engines.

1. Bonding characteristics of aluminum

① The valence electron layer structure of Al atom is 3s 2 3p 1, which often shows a +3 oxidation state in compounds. Due to the strong polarization ability of Al 3+, Al 3+ is often covalent in the compound, showing the characteristic of electron vacancy. The molecules themselves assemble or form adducts.

② In addition, the vacant 3D orbital of Al atom and electron pair donor can form stable complexes with coordination number of 6 or 4. For example, Na 3 [AlF 6], Na[AlCl 4], etc.

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