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chemical bond

(Encyclopedia)chemical bond, mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to lead to the for...

ionic bond

(Encyclopedia)ionic bond: see chemical bond.

junk bond

(Encyclopedia)junk bond, a bond that involves greater than usual risk as an investment and pays a relatively high rate of interest, typically issued by a company lacking an established earnings history or having a ...

metallic bond

(Encyclopedia)metallic bond: see chemical bond; metal. ...

Bond, Julian

(Encyclopedia)Bond, Julian (Horace Julian Bond), 1940–2015, U.S. civil-rights leader, b. Nashville, Tenn. As a student at Morehouse College, he participated in sit-ins at segregated Atlanta restaurants. He was a ...

bond, chemical

(Encyclopedia)bond, chemical: see chemical bond. ...

Bond Street

(Encyclopedia)Bond Street, in Westminster, London, England, famous for its fashionable shops. Among the noted residents of Bond St. have been the authors Laurence Sterne, James Boswell, and Jonathan Swift; Admiral ...

Hyperion, in astronomy

(Encyclopedia)Hyperion hīpērˈēən [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn VII (or S7), Hyperion is the largest highly irregular (nonspherical) body in...

Feynman, Richard Phillips

(Encyclopedia)Feynman, Richard Phillips fīnˈmən [key], 1918–88, American physicist, b. New York City, B.S. Massachusetts Institute of Technology, 1939, Ph.D. Princeton, 1942. From 1942 to 1945 he worked on the...

Phillips, David Graham

(Encyclopedia)Phillips, David Graham, 1867–1911, American writer, b. Madison, Ind., grad. College of New Jersey (now Princeton), 1887. He worked as a newspaper reporter in Cincinnati and New York City, rising to ...