aluminium

element 13|aluminum

Aluminium

metallic chemical element of silvery appearance with symbol Al and atomic number 13

Aluminium bar surface etched.jpg

Al

Chemical element with atomic number 13 (Al)

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Aluminium or aluminum is a chemical element; it has symbol??Al and atomic number??13. It has a density lower than other common metals, about one-third that of steel. Aluminium has a great affinity toward oxygen, forming a protective layer of oxide on the surface when exposed to air. It visually resembles silver, both in its color and in its great ability to reflect light. It is soft, nonmagnetic, and ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the 12th-most abundant element in the universe. The radioactivity of 26Al leads to it being used in radiometric dating.

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Aluminium

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