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neutron

(Encyclopedia)neutron, uncharged elementary particle of slightly greater mass than the proton. It was discovered by James Chadwick in 1932. The stable isotopes of all elements except hydrogen and helium contain a n...

competition, in biology

(Encyclopedia)competition, in biology, relationship between members of the same or different species in which individuals are adversely affected by those having the same living requirements, such as food or space. ...

London School of Economics and Political Science

(Encyclopedia)London School of Economics and Political Science, at London, England; founded 1895, recognized as a school of the Univ. of London (see London, Univ. of) in 1900. It publishes many periodicals, includi...

Louis II, king of Hungary and Bohemia

(Encyclopedia)Louis II, 1506–26, king of Hungary and Bohemia (1516–26), son and successor of Uladislaus II. He was the last of the Jagiello dynasty in the two kingdoms. In the face of intensified attacks by Sul...

John II, king of Aragón and Sicily

(Encyclopedia)John II, 1397–1479, king of Aragón and Sicily (1458–79), king of Navarre (1425–79), count of Barcelona. He succeeded his brother, Alfonso V, in Aragón, Catalonia, and Sicily and became king of...

Keokuk, chief of the Sac and Fox

(Encyclopedia)Keokuk kēˈəkək [key], c.1780–1848, Native American, chief of the Sac and Fox, b. near present-day Rock Island, Ill. When Black Hawk supported the British in the War of 1812, Keokuk refused to jo...

Anne, queen of England, Scotland, and Ireland

(Encyclopedia)Anne, 1665–1714, queen of England, Scotland, and Ireland (1702–7), later queen of Great Britain and Ireland (1707–14), daughter of James II and Anne Hyde; successor to William III. Queen Anne ...

Frederick III, king of Denmark and Norway

(Encyclopedia)Frederick III, 1609–70, king of Denmark and Norway (1648–70), son and successor of Christian IV. He at first made great concessions to the powerful nobles but later asserted his own power. In 1657...

Frederick IV, king of Denmark and Norway

(Encyclopedia)Frederick IV, 1671–1730, king of Denmark and Norway (1699–1730), son and successor of Christian V. He allied himself (1699) with Augustus II of Poland and Saxony and with Peter I of Russia against...

Frederick V, king of Denmark and Norway

(Encyclopedia)Frederick V, 1723–66, king of Denmark and Norway (1746–66), son and successor of Christian VI. Frederick's reign was one of commercial expansion and prosperity. Loans, subsidies, and treaties aide...