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Palawan

(Encyclopedia)Palawan päläˈwän [key], island (1990 pop. 528,287), 4,550 sq mi (11,785 sq km), 5th largest of the Philippines, N of Borneo and between the Sulu Archipelago and the South China Sea. Lumbering is a...

Bradford, Andrew

(Encyclopedia)Bradford, Andrew, 1686–1742, colonial printer of Pennsylvania, b. Philadelphia; son of William Bradford (1663–1752). Andrew learned the trade in his father's shop in New York City and in 1712 went...

fluorine

(Encyclopedia)fluorine flo͞oˈərēn, –rĭn [key], gaseous chemical element; symbol F; at. no. 9; at. wt. 18.9984; m.p. −219.6℃; b.p. −188.14℃; density 1.696 grams per liter at STP; valence −1. Fluorin...

Semyonov, Nikolay Nikolayevich

(Encyclopedia)Semyonov, Nikolay Nikolayevich, or Nikolai Nikolaevic Semenov, 1896–1986, Soviet physical chemist, Ph.D. Petrograd Univ., 1917. Semyonov was a professor at the Leningrad Physico-Technical Institute ...

joliotium

(Encyclopedia)joliotium zhōlyōˈshēəm [key], symbol Jl, former suggested name for element 105, now called dubnium. ...

kurchatovium

(Encyclopedia)kurchatovium kûrˌchətōˈvēəm [key], symbol Ku, former suggested name for element 104, now called rutherfordium. ...

Breviary of Alaric

(Encyclopedia)Breviary of Alaric ăˈlərĭk [key], Visigothic code of Roman law issued (506) by King Alaric II for his Roman subjects in Spain and S Gaul. It is also known as the Lex Romana Visigothorum. Based lar...

Río

(Encyclopedia)Río and Rio, respectively Spanish and Portuguese terms for river. For those not listed here, see under the second element of the name. Thus, for Río Lerma, see Lerma. ...

International Union of Pure and Applied Chemistry

(Encyclopedia)International Union of Pure and Applied Chemistry (IUPAC), an international organization est. 1919 to advance the chemical sciences and contribute to the application of chemistry to the service of hum...

molecule

(Encyclopedia)molecule mŏlˈəkyo͞ol [key] [New Lat.,=little mass], smallest particle of a compound that has all the chemical properties of that compound. A single atom is usually not referred to as a molecule, a...