a transuranic element. Symbol: Bk; atomic number: 97; atomic weight: 249 (?).
a metallic transuranic element produced by bombardment of americium. Symbol: Bk; atomic no: 97; half-life of most stable isotope, 247Bk: 1400 years; valency: 3 or 4; relative density: 14 (est)
A synthetic, radioactive metallic element of the actinide series that is produced from americium, curium, or plutonium. Its most stable isotope has a half-life of about 1,400 years. Atomic number 97; melting point 986°C; valence 3, 4. See Periodic Table.
a city in SE Michigan, near Detroit. Contemporary Examples The One That Adelson Won Ali Gharib November 6, 2012 How the 1% Rules David Frum July 12, 2012 Historical Examples Talbot’s Angles Amy E. Blanchard Bluff Crag Mrs. George Cupples Life and Labors of Elder John Kline, the Martyr Missionary John Kline Talbot’s Angles Amy […]
- Berkner island
an island in Antarctica, in the S Weddell Sea, between the Ronne Ice Shelf and the Filchner Ice Shelf.
adjective (Austral, slang) berserk Historical Examples Yiddish Tales Various
Also called Berks [burks; British bahrks] /bɜrks; British bɑrks/ (Show IPA). a county in S England. 485 sq. mi. (1255 sq. km). one of an English breed of black hogs, having white markings on the feet, face, and tail. a steam locomotive having a two-wheeled front truck, eight driving wheels, and a four-wheeled rear truck. […]