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Paris green

(Encyclopedia)Paris green, also called Schweinfurt green, an extremely poisonous, bright green powder that was formerly used extensively as a pigment (e.g., in wallpaper) and that is sometimes used as an insecticid...

cupric

(Encyclopedia)cupric kyo͞oˈprĭk [key], copper in the +2 valence state. ...

cuprous

(Encyclopedia)cuprous kyo͞oˈprəs [key], copper in the +1 valence state. ...

Chingola

(Encyclopedia)Chingola chĭng-gōˈlä [key], city, N central Zambia. It is a copper-mining center, located on ...

Sheffield plate

(Encyclopedia)Sheffield plate, metalware of copper, silver-plated by fusion, originated at Sheffield, England. This process of plating was discovered c.1742 by a Sheffield cutler, Thomas Boulsover, who found while ...

flame test

(Encyclopedia)flame test, test used in the identification of certain metals. It is based on the observation that light emitted by any element gives a unique spectrum when passed through a spectroscope. When a salt ...

cupric sulfate

(Encyclopedia)cupric sulfate ko͞oˈprĭk sŭlˈfāt, kyo͞oˈ– [key] or copper (II) sulfate, chemical compound, CuSO4, taking the form of white rhombohedral crystals or amorphous powder. It decomposes at 650℃ ...

Townsville

(Encyclopedia)Townsville, city (1991 pop. 186,757), NE Queensland, Australia, on Cleveland Bay. It is a major port. Wool, hides, meat, copper, and sugar are the chief exports. Copper and sugar refining, meat and fi...

Anaconda, city, United States

(Encyclopedia)Anaconda ănəkŏnˈdə [key], city (2020 pop. 9,162), seat of Deer Lodge co., SW Mont.; inc. 1887. Marcus Daly chose this place (1883) for the Anaconda Copper Mining Company's ...

Leninogor

(Encyclopedia)Leninogor lyĕˌnyĭnəgôrskˈ [key], city (1989 pop. 68,706), NE Kazakhstan, in the Altai Mts. It is a mining center in an area that is the chief source of Kazakh zinc and lead. Silver, copper, and ...