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Tennant, Smithson

(Encyclopedia) Tennant, Smithson, 1761–1815, English chemist. In 1796 he proved, by burning a diamond, that the diamond consists solely of carbon. In 1804 he announced his discovery of osmium and…

Victoria Tennant Biography

Victoria Tennantactress, screenwriterBorn: 9/30/1953Birthplace: London, England Tennant acted in a number of British plays and films before coming to Hollywood in the 1980s. She appeared in…

bleaching powder

(Encyclopedia) bleaching powder, white or nearly white powder that is usually a mixture of calcium chloride hypochlorite, CaCl(OCl); calcium hypochlorite, Ca(OCl)2; and calcium chloride, CaCl2.…

Evatt, Herbert Vere

(Encyclopedia) Evatt, Herbert VereEvatt, Herbert Verevĭr ĕvˈət [key], 1894–1965, Australian statesman. He became (1940) a Labor member of the House of Representatives, before being appointed (1941)…

osmium

(Encyclopedia) osmiumosmiumŏzˈmēəm [key], metallic chemical element; symbol Os; at. no. 76; at. wt. 190.23; m.p. 3,045±30℃; b.p. 5,027±100℃; sp. gr. 22.57 at 20℃; valence usually +0 to +8. Osmium is…

Hughes, Ted

(Encyclopedia) Hughes, Ted (Edward James Hughes), 1930–98, English poet, b. Mytholmyroyd, Yorkshire, studied Cambridge. Hughes's best poetry focuses on the unsentimental within nature. His poems are…

iridium

(Encyclopedia) iridiumiridiumĭrĭdˈēəm [key], metallic chemical element; symbol Ir; at. no. 77; at. wt. 192.217; m.p. about 2,410℃; b.p. about 4,130℃; sp. gr. 22.55 at 20℃; valence +3 or +4. Iridium…