State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis

Describe the uses of metals in terms of their physical properties, including: (a) aluminium in the manufacture of aircraft because of its low density (b) aluminium in the manufacture of overhead electrical cables because of its low density and good electrical conductivity (c) aluminium in food containers because of its resistance to corrosion (d) copper in electrical wiring because of its good electrical conductivity and ductility

Explain the apparent unreactivity of aluminium in terms of its oxide layer