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element

(Encyclopedia)CE5 element, in chemistry, a substance that cannot be decomposed into simpler substances by chemical means. A substance such as a compound can be decomposed into its constituent elements by means o...

Conant, James Bryant

(Encyclopedia)Conant, James Bryant kōˈnənt [key], 1893–1978, American educator, chemist, and diplomat, b. Dorchester, Mass., grad. Harvard (B.A., 1913; Ph.D., 1916). Except for a brief period in the army (1917...

grenade

(Encyclopedia)grenade grĭnādˈ [key], small bomb either thrown by hand or shot from a modified rifle or a grenade launcher. It may be filled with gas or chemicals but more often holds an explosive charge that fra...

Fuchs, Klaus Emil

(Encyclopedia)Fuchs, Klaus Emil fo͝oks, fo͞oks [key], 1912–88, British physicist and Communist spy, b. Germany. In 1933 he fled Germany for England, where he completed his education. Interned (1940–41) in Can...

Moore, Henry

(Encyclopedia)Moore, Henry, 1898–1986, English sculptor. Moore's early sculpture was angular and rough, strongly influenced by pre-Columbian art. About 1928 he evolved a more personal style which has gained him a...

Wigner, Eugene Paul

(Encyclopedia)Wigner, Eugene Paul wĭgˈnər [key], 1902–95, American physicist, b. Hungary, grad. Technische Hochschule, Berlin, 1925. He was a professor at Princeton from 1930 to 1936 and again from 1938 to 197...

butoh

(Encyclopedia)butoh [Jap.,=dance of darkness], avant-garde dance form developed in post–World War II Japan. First performed in 1959 by the dancers Tatsumi Hijikata (1928–86) and Kazuo Ohno (1906–2010), butoh ...

ammonium chloride

(Encyclopedia)ammonium chloride əmōˈnēəm klôrˈīd [key], chemical compound, NH4Cl, a white or colorless, odorless, water-soluble, cubic crystalline salt with a biting taste, commonly known as sal ammoniac. I...

formula, in chemistry

(Encyclopedia)formula, in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent chemical reactions....

radio astronomy

(Encyclopedia)radio astronomy, study of celestial bodies by means of the electromagnetic radio frequency waves they emit and absorb naturally. Radio waves also come from outside the Milky Way. These extragalact...