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aluminum
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Diagram of the periodic table entry for aluminum, showing its atomic number 13, symbol Al, atomic weight, electron configuration, and physical properties such as solid state and face-centered cubic crystal structure at room temperature. Explore an interactive periodic table of the elements
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Diagram of the periodic table entry for aluminum, showing its atomic number 13, symbol Al, atomic weight, electron configuration, and physical properties such as solid state and face-centered cubic crystal structure at room temperature.
aluminum Aluminum.

aluminum

chemical element
Also known as: Al, aluminium
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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aluminum (Al), chemical element, a lightweight silvery white metal of main Group 13 (IIIa, or boron group) of the periodic table. Aluminum is the most abundant metallic element in Earth’s crust and the most widely used nonferrous metal. Because of its chemical activity, aluminum never occurs in the metallic form in nature, but its compounds are present to a greater or lesser extent in almost all rocks, vegetation, and animals. Aluminum is concentrated in the...

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