(Encyclopedia) poloniumpoloniumpəlōˈnēəm [key], radioactive chemical element; symbol Po; at. no. 84; mass no. of most stable isotope 209; m.p. 254℃; b.p. 962℃; sp. gr. about 9.4; valence +2 or +4.…
(Encyclopedia) Bemba Gombo, Jean-Pierre, 1962–, Congolese politician. Born to wealthy parents, he was educated in Brussels and built a business empire in what was then Zaïre. In the early 1990s he…
(Encyclopedia) Du Pont de Nemours, Pierre SamuelDu Pont de Nemours, Pierre Samuelpyĕr sämüĕlˈ dü pôN də nəm&oomacr;rˈ [key], 1739–1817, French economist, one of the physiocrats. Early in his…
(Encyclopedia) Rivette, Jacques Pierre Louis, 1928–2016, French filmmaker and critic b. Rouen. One of the French New Wave directors of the 1950s and 60s, he wrote criticism for the influential…
(Encyclopedia) Perrin, Jean BaptistePerrin, Jean BaptistezhäN bätēstˈ pĕrăNˈ [key], 1870–1942, French physicist. From 1910 to 1940 he was professor at the Univ. of Paris, and in 1941 he came to the…
(Encyclopedia) Lamarck, Jean Baptiste Pierre Antoine de Monet, chevalier deLamarck, Jean Baptiste Pierre Antoine de Monet, chevalier dezhäN bätēstˈ pyĕr äNtwänˈdə mônāˈ, shəvälyāˈ də lämärkˈ [key],…
(Encyclopedia) franciumfranciumfrănˈsēəm [key] [from France], radioactive chemical element; symbol Fr; at. no. 87; mass no. of most stable isotope 223; m.p. about 27℃ (estimated); b.p. 677℃ (…
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(Encyclopedia) LublinLublinl&oomacr;ˈblēn [key], city (1994 est. pop. 352,100), capital of Lubelskie prov., SE Poland. It is a railway junction and industrial center. Manufactures include trucks…
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