Aluminium (or aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.

Although the substance aluminum (as we say in the U.S.) is the most abundant of all the metallic elements in the Earth's crust, it does not occur in metallic form in nature; instead it exists in compounds found in almost all rocks as well as in plants and animals.

2024年12月21日 · 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.

2025年1月15日 · Aluminum is a solid, nonmagnetic metal with a silvery-white color and a slight bluish tint. When polished, aluminum’s surface becomes highly reflective, enhancing its appeal for decorative uses.

2025年1月15日 · But what exactly is an aluminum alloy, and why is it so indispensable across various industries? In this comprehensive guide, we’ll unravel the mysteries of aluminum alloys, from their intricate chemical compositions to the diverse …

Aluminum is the second most abundant metallic element in the Earth's crust after silicon, yet it is a comparatively new industrial metal that has been produced in commercial quantities for just over 100 years.

2024年1月23日 · Aluminum is also spelled aluminum (chemical symbol: Al). Aluminium is the most abundant metal in the Earth’s crust, accounting for approximately 8% of the crust by weight. It is a boron group element with low density, high strength, corrosion resistance, and …