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aluminum 音标拼音: [əl'umənəm] n. 铝 铝 aluminum 铝 aluminum n 1: a silvery ductile metallic element found primarily in bauxite [synonym: {aluminum}, {aluminium}, {Al}, {atomic number 13}] Aluminum \A*lu"mi*num\ ([.a]*l[=u]*m[i^]*n[u^]m), n. The metallic element forming the base of alumina. This metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, having a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al. Also called {aluminium}. [1913 Webster PJC] aluminum Symbol: Al Atomic number: 13 Atomic weight: 26.9815 Silvery-white lustrous metallic element of group 3 of the periodic table. Highly reactive but protected by a thin transparent layer of the oxide which quickly forms in air. There are many alloys of aluminum, as well as a good number of industrial uses. Makes up 8.1% of the Earth's crust, by weight. Isolated in 1825 by H.C. Oersted.
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