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Aluminum is a chemical element with the symbol Al and atomic number 13. It is a post-transition metal and belongs to group 13 of the periodic table. Aluminum is found in the Earth's crust and is the most abundant metal and the third most abundant element. It is a silvery-white, lightweight metal known for its excellent corrosion resistance and strength.

The primary ore of aluminum is bauxite. The extraction of aluminum from bauxite is an energy-intensive process called the Hall-Héroult process, which involves electrolysis. Pure aluminum is soft and lacks strength, but it forms alloys with other elements like copper, magnesium, and silicon, significantly enhancing its mechanical properties.

Aluminum is widely used in various industries. Its low density and high strength-to-weight ratio make it ideal for aerospace and automotive applications. It is also used in construction for window frames, doors, and structural components. The packaging industry heavily relies on aluminum for beverage cans and foil due to its inertness and ability to be easily formed. Furthermore, aluminum is employed in electrical conductors, cookware, and many other consumer goods. Its recyclability makes it an environmentally friendly material, as recycling aluminum requires significantly less energy than producing it from raw materials.