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complex ion

(Encyclopedia)complex ion, charged molecular aggregate (see ion), consisting of a metallic atom or ion to which is attached one or more electron-donating molecules. In some complex ions, such as sulfate, SO4−2, t...

zinc

(Encyclopedia)zinc, metallic chemical element; symbol Zn; at. no. 30; at. wt. 65.38; m.p. 419.58℃; b.p. 907℃; sp. gr. 7.133 at 25℃; valence +2. Zinc is a lustrous bluish-white metal. It is found in Group 12 o...

Downers Grove

(Encyclopedia)Downers Grove, village (2020 pop. 50,247), Du Page co., NE Ill.; settled 1832, inc. 1873. Downers Grove has undergone population growth and commercial d...

Cheongju

(Encyclopedia)Cheongju or Chongju chôngˈjo͞oˈ [key], city, capital of North Chungcheong prov., W central South Korea. It ...

Frauenfeld

(Encyclopedia)Frauenfeld frouˈənfĕlt [key], city, capital of Thurgau canton, NE Switzerland, on the Murg River. ...

Grand Haven

(Encyclopedia)Grand Haven, city (2020 pop. 11,011), seat of Ottawa co., SW Mich., at the mouth of the Grand River; inc. 1867. It is a port on Lake Michigan that ships...

Gladbeck

(Encyclopedia)Gladbeck glätˈbĕk [key], city, North Rhine–Westphalia, W Germany, an industrial center o...

National City

(Encyclopedia)National City, city (1990 pop. 54,249), San Diego co., S Calif., on San Diego Bay; inc. 1887. Structural metal is fabricated, and there is shipbuilding and the manufacture of recycling machinery, plas...

Lüdenscheid

(Encyclopedia)Lüdenscheid lüˈdÉ™nshÄ«t [key], city (1994 pop. 80,280), North Rhine–Westphalia, W Germany. It is an industrial center; manufactures include aluminum, metal products, plastics, and synthetics. LÃ...

Lynbrook

(Encyclopedia)Lynbrook, village (1990 pop. 19,208), Nassau co., SE N.Y.; inc. 1911. It is a suburb of New York City on the south shore of Long Island. There is sheet-metal and furniture manufacture. Old Church date...