gal·li·um /ˈgæliəm/
 鎵


 gal·li·um /ˈgælɪəm/ 名詞
 鎵


 Gal·li·um n.  Chem. A rare metallic element, found combined in certain zinc ores. It is white, hard, and malleable, resembling aluminium, and remarkable for its low melting point (86° F., 30° C.). Symbol, Ga; at. wt., 69.9. Gallium is chiefly trivalent, resembling aluminium and indium. It was predicted with most of its properties, under the name eka-aluminium, by the Russian chemist Mendelyeev on the basis of the periodic law.  This prediction was verified in its discovery (in 1875) by the French chemist Lecoq de Boisbaudran by its characteristic spectrum (two violet lines), in an examination of a zinc blende from the Pyrenees.

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 gallium
      n : a rare silvery (usually trivalent) metallic element; brittle
          at low temperatures but liquid above room temperature;
          occurs in trace amounts in bauxite and zinc ores [syn: Ga,
           atomic number 31]


 gallium
 Symbol: Ga
 Atomic number: 31
 Atomic weight: 69.72
 Soft silvery metallic element, belongs to group 13 of the periodic table.
 The two stable isotopes are Ga-69 and Ga-71. Eight radioactive isotopes
 are known, all having short half-lives. Gallium Arsenide is used as a
 semiconductor. Corrodes most other metals by diffusing into their lattice.
 First identified by Francois Lecoq de Boisbaudran in 1875.