Columbia Encyclopedia

(Encyclopedia) ore, metal-bearing mineral mass that can be profitably mined. Nearly all rock deposits contain some metallic minerals, but in many cases the concentration of metal is too low to justify mining the ore...

(Encyclopedia) carbonate kärˈbənātˌ, –nət [key], chemical compound containing the carbonate radical or ion, CO3−2. Most familiar carbonates are salts that are formed by reacting an inorganic base (e.g., a ...

(Encyclopedia) flerovium, artificially produced radioactive chemical element; symbol Fl; at. no. 114; mass number of most stable isotope 289; m.p., b.p., sp. gr., and valence unknown. Situated in Group 14 of the per...

(Encyclopedia) Novaya Zemlya nôˌvīə zĭmlyäˈ [key] [Rus.,=New Land], archipelago, c.35,000 sq mi (90,650 sq km), in the Arctic Ocean between the Barents and Kara seas, NW Russia. It consists of two main island...

(Encyclopedia) National Republican party, in U.S. history, a short-lived political party opposed to Andrew Jackson. In the election of 1828, which Jackson won overwhelmingly, some of the supporters of his opponent, ...

(Encyclopedia) organometallic chemistry, the reactions and use of a class of compounds (R-M) that contain a covalent bond between carbon and metal. They are prepared either by direct reaction of the metal with an or...

(Encyclopedia) Maputo Bay, formerly Delagoa Bay dĕlˌəgōˈə [key], inlet of the Indian Ocean, c.55 mi (90 km) long and 20 mi (30 km) wide, S Mozambique, SE Africa; Maputo, the capital and chief port of Mozambiqu...

(Encyclopedia) Compton, Sir John (John George Melvin Compton), 1925–2007, St. Lucian political leader, b. Canouan, Windward Islands (now in St. Vincent and the Grenadines). Compton attended high school in St. Luci...

(Encyclopedia) bustard quail or button quail, any of the small ground-running Old World birds of the family Turnicidae. Also called a hemipode, it resembles a true quail in appearance and way of life but is more clo...

(Encyclopedia) Chukchi Peninsula cho͞okˈchē [key], northeastern extremity of Asia, terminating in Cape Dezhnev, Russian Far East. Washed by the E Siberian and Chukchi seas in the northeast, the peninsula is the e...