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polonium

(Encyclopedia)polonium pəlōˈnēəm [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. Polonium is an e...

Bullins, Ed

(Encyclopedia)Bullins, Ed, 1935-2021, American playwright, b. Philadelphia, Pa., as Edward Artie Bullins, Antioch Univ. of San Fransico (B.A., 1989), San Francisco S...

actinium

(Encyclopedia)actinium ăktĭnˈēəm [key] [Gr.,=like a ray], radioactive chemical element; symbol Ac; at. no. 89; mass number of most stable isotope 227; m.p. about 1,050℃; b.p. 3,200℃±300℃; sp. gr. 10.07;...

Saint-Denis, city, France

(Encyclopedia)Saint-Denis săN-dənēˈ [key], city (1990 pop. 90,806), Seine–Saint-Denis dept., N central France. It is an industrial suburb N of Paris. Metals, chemicals, machinery, electronics, and food produc...

Venezuela Boundary Dispute

(Encyclopedia)Venezuela Boundary Dispute, diplomatic controversy, notable for the tension caused between Great Britain and the United States during much of the 19th cent. Of long standing, the dispute concerned the...

Giap, Vo Nguyen

(Encyclopedia)Giap, Vo Nguyen vô nəwēˈĕn zhäp [key], 1911–2013, Vietnamese military leader and government official whose strategies helped drive the forces of Japan, France, and the United States from Vietn...

Presley, Elvis

(Encyclopedia)Presley, Elvis (Elvis Aaron Presley), 1935–77, American popular singer, b. Tupelo, Miss. Exposed to gospel music from childhoo...

Charlemagne

(Encyclopedia)CE5 Carolingian Empire (814) Charlemagne (Charles the Great or Charles I) shärˈləmān [key] [O.Fr.,=Charles the great], 742?–814, emperor of the West (800–814), Carolingian king of the Fran...

Flemish art and architecture

(Encyclopedia)Flemish art and architecture, works of art and structures produced in the region of Europe known for centuries as Flanders. Netherlandish art is another term sometimes used for these works. Art produc...

Frank, Anne

(Encyclopedia)Frank, Anne, 1929–45, German diarist, b. Frankfurt as Anneliese Marie Frank. In order to escape Nazi persecution, her family emigrated (1933) to Amsterdam, where her father Otto became a business ow...