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Soddy, Frederick
(Encyclopedia)Soddy, Frederick sŏdˈē [key], 1877–1956, English chemist. He worked under Lord Rutherford at McGill Univ. and with Sir William Ramsay at the Univ. of London. After serving (1910–14) as lecturer...protactinium
(Encyclopedia)protactinium prōˌtăktĭnˈēəm [key], radioactive chemical element; symbol Pa; at. no. 91; mass number of most stable isotope 231; m.p. greater than 1,600℃; b.p. 4,026℃; sp. gr. 15.37 (calcula...Rutherford, Ernest Rutherford, 1st Baron
(Encyclopedia)Rutherford, Ernest Rutherford, 1st Baron, 1871–1937, British physicist, b. New Zealand. Rutherford left New Zealand in 1895, having earned three degrees from the Univ. of New Zealand but having fail...isotope
(Encyclopedia) CE5 Isotopes of hydrogen isotope īˈsətōp [key], in chemistry and physics, one of two or more atoms having the same atomic number but differing in atomic weight and mass number. The concept of ...Frederick I, king of Prussia
(Encyclopedia)Frederick I, 1657–1713, first king of Prussia (1701–13), elector of Brandenburg (1688–1713) as Frederick III. He succeeded his father, Frederick William the Great Elector, in Brandenburg. Throug...Frederick II, king of Sicily
(Encyclopedia)Frederick II, 1272–1337, king of Sicily (1296–1337), 3d son of Peter III of Aragón. When his brother, who was king of Sicily, became (1291) king of Aragón as James II, Frederick was his regent i...Frederick I, Holy Roman emperor and German king
(Encyclopedia)Frederick I or Frederick Barbarossa bärbərôsˈə [key] [Ital.,=red beard], c.1125–90, Holy Roman emperor (1155–90) and German king (1152–90), son of Frederick of Hohenstaufen, duke of Swabia,...Frederick William I
(Encyclopedia)Frederick William I, 1688–1740, king of Prussia (1713–40), son and successor of Frederick I. He continued the administrative reforms and the process of centralization begun by Frederick William, t...Frederick William II
(Encyclopedia)Frederick William II, 1744–97, king of Prussia (1786–97), nephew and successor of Frederick II (Frederick the Great). He had the power but lacked the ability of his distinguished predecessors. He ...Frederick William IV
(Encyclopedia)Frederick William IV, 1795–1861, king of Prussia (1840–61), son and successor of Frederick William III. A romanticist and a mystic, he conceived vague schemes of reform based on a revival of the m...Browse by Subject
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