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Periodic Table of the Elements: Silicon
(Encyclopedia)Periodic Table of the Elements: Silicon ...microelectronics
(Encyclopedia)microelectronics, branch of electronic technology devoted to the design and development of extremely small electronic devices that consume very little electric power. Although the term is sometimes us...Si, chemical symbol
(Encyclopedia)Si, symbol for the element silicon. ...Cuyahoga Valley National Park
(Encyclopedia)Cuyahoga Valley National Park kīˌəhōˈgə [key], 32,950 acres (13,334 hectares), in the Cuyahoga River valley between Akron and Cleveland, NE Ohio; est. as a national recreation area 1974, designa...lily of the valley
(Encyclopedia)lily of the valley, common name for either of the two species of Convallaria, spring-blooming perennials of the family Liliaceae (lily family). C. majalis, the species usually in cultivation, is nativ...Kobuk Valley National Park
(Encyclopedia)Kobuk Valley National Park kōbo͝okˈ [key], 1,750,737 acres (709,048 hectares), NW Alaska. Located in rugged terrain N of the Arctic Circle, the park embraces the central valley of the Kobuk River, ...Packard, David
(Encyclopedia)Packard, David, 1912–96, American business executive, b. Pueblo, Colo., grad. Stanford (B.A., 1934; M.S., 1939). He and classmate William R. Hewlett opened a garage-based business, which became (193...carbide
(Encyclopedia)carbide, any one of a group of compounds that contain carbon and one other element that is either a metal, boron, or silicon. Generally, a carbide is prepared by heating a metal, metal oxide, or metal...Hewlett, William Redington
(Encyclopedia)Hewlett, William Redington hyo͞oˈlĭt [key], 1913–2001, American engineer and business executive, b. Ann Arbor, Mich., grad. Stanford (B.S. 1934, Engineer 1939), Massachusetts Institute of Technol...silicone
(Encyclopedia)silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which are unusually sta...Browse by Subject
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