Aluminium or aluminum (in North American English) is a chemical element in the boron group with symbol Al and atomic number 13. |
It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element in the Earth's crust
(after oxygen and silicon) and its most abundant metal.
Aluminium makes up about 8% of the crust by mass, though it is less common in the mantle below.