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.

2024年12月21日 · British chemist Sir Humphry Davy had prepared (1809) an iron-aluminum alloy by electrolyzing fused alumina (aluminum oxide) and had already named the element aluminum; the word later was modified to aluminium in England and some other European countries.

Aluminum (in British English: Aluminium) is a chemical element. The symbol for aluminum is Al, and its atomic number is 13. aluminum is the most abundant metal. It is a mononuclidic element.

Element Aluminium (Al), Group 13, Atomic Number 13, p-block, Mass 26.982. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Aluminium, or Aluminum in American spelling, is an ancient metal and has a diverse range of uses. It was discovered in 1824 and its light weight, high electrical conductivity and high resistant to corrosion has make it an industrially attractive metal.

2009年6月16日 · Aluminium citrate is more soluble than many other aluminium compounds and is likely to be more bioavailable from drinking-water than from food. The Committee concluded that the NOAEL of 30 mg/kg bw per day was an appropriate basis for establishing a PTWI for aluminium compounds.

The element was known in prehistoric times. In 1825, the Danish physicist, Hans Christian Oersted, isolated impure aluminium. The pure metal was first isolated by the German chemist Friedrich Wöhler in 1827.

In complex ions or molecules, Aluminium often adopts an octahedral geometry, with six atoms, ions, or molecules surrounding the central Aluminium atom. However, tetracoordinated and pentacoordinated Aluminium complexes also exist.

2023年4月15日 · Aluminium is the most prevalent metallic element in the Earth’s crust (8.23% by mass) and the third most plentiful element overall (after oxygen and silicon). Aluminium is found in a wide range of silicates in the Earth’s crust. The Earth’s mantle, on the other hand, is only 2.38% aluminum by mass.

2018年6月11日 · aluminum (əlōō´mĬnəm), called in British countries aluminium (ăl´yōōmĬn´ēəm), metallic chemical element; symbol Al; at. no. 13; at. wt. 26.98154; m.p. 660.37°C; b.p. 2,467°C; sp. gr. 2.6989 at 20°C; valence +3. Aluminum is a silver-white metal with a face-centered cubic crystalline structure.