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1 uranium
------------------------------------------------------------[English Word] uranium[Swahili Word] yuranimu[Part of Speech] noun[Class] 9------------------------------------------------------------[English Word] uranium[Swahili Word] urani[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a silvery heavy radioactive polyvalent metallic element that is found especially in pitchblende and uraninite and exists naturally as a mixture of three isotopes of mass number 234, 235, and 238 in the proportions of 0.006 percent, 0.71 percent, and 99.28 percent respectively (identified circa 1797)[Terminology] chemistry------------------------------------------------------------ -
2 plutonium
[English Word] plutonium[Swahili Word] plutoni[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a radioactive metallic element similar chemically to uranium that is formed as the isotope 239 by decay of neptunium and found in minute quantities in pitchblende, that undergoes slow disintegration with the emission of an alpha particle to form uranium 235, and that is fissionable with slow neutrons to yield atomic energy (identified 1942)[Terminology] chemistry------------------------------------------------------------ -
3 neptunium
[English Word] neptunium[Swahili Word] neptuni[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a radioactive metallic element that is chemically similar to uranium and is obtained in nuclear reactors as a by-product in the production of plutonium (identified 1941)[Terminology] chemistry------------------------------------------------------------ -
4 promethium
[English Word] promethium[Swahili Word] promethi[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a radioactive metallic element of the rare-earth group obtained as a fission product of uranium or from neutron-irradiated neodymium (identified 1948)[Terminology] chemistry------------------------------------------------------------ -
5 technetium
[English Word] technetium[Swahili Word] tekineti[Part of Speech] noun[Class] 9[Dialect] recent[English Definition] a metallic element obtained by bombarding molybdenum with deuterons or neutrons and in the fission of uranium (identified circa 1946)[Terminology] chemistry------------------------------------------------------------
См. также в других словарях:
Uranium — (pronEng|jʊˈreɪniəm) is a silvery gray metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. It has 92 protons and 92 electrons, 6 of them valence electrons. It can have between 141 and … Wikipedia
Uranium — Protactinium ← Uranium → Neptunium Nd … Wikipédia en Français
URANIUM — L’uranium (symbole U, numéro atomique 92) est un élément chimique métallique très dense (d = 19), dur, dont la couleur grise rappelle celle du nickel. Pendant les cent cinquante ans qui suivirent sa découverte, en 1789, par Martin Heinrich… … Encyclopédie Universelle
uranium — [yoo rā′nē əm] n. [ModL: so named (1789) by M. H. Klaproth (see TELLURIUM), its discoverer, after URANUS, recently (1781) discovered planet + IUM] a very hard, heavy, silver colored, radioactive, metallic chemical element, one of the actinides,… … English World dictionary
Uranium — U*ra ni*um, n. [NL., from Uranus the planet. See {Uranus}.] (Chem.) An element of the chromium group, found in certain rare minerals, as pitchblende, uranite, etc., and reduced as a heavy, hard, nickel white metal which is quite permanent. Its… … The Collaborative International Dictionary of English
uranium — Symbol: U Atomic number: 92 Atomic weight: (231) White radioactive metallic element belonging to the actinoids. Three natural isotopes, U 238, U 235 and U 234. Uranium 235 is used as the fuel for nuclear reactors and weapons. Discovered by Martin … Elements of periodic system
Uranium — Uranium, so v.w. Uranorama … Pierer's Universal-Lexikon
Uranium — (U) Уран химический радиоактивный элемент (металл) с атомным номером 92 и атомной массой наиболее распространенного и устойчивого изотопа 238. Природный уран состоит из смеси трех изотопов урана 238, урана 235 и урана 234, из которых практическое … Термины атомной энергетики
uranium — rare metallic element, 1797, named 1789 in Modern Latin by its discoverer, German chemist and mineralogist Martin Heinrich Klaproth (1743 1817), for the recently found planet URANUS (Cf. Uranus) (q.v.) … Etymology dictionary
uranium — ► NOUN ▪ a grey dense radioactive metallic chemical element used as a fuel in nuclear reactors. ORIGIN from the planet Uranus … English terms dictionary
uranium — /yoo ray nee euhm/, n. Chem. a white, lustrous, radioactive, metallic element, occurring in pitchblende, and having compounds that are used in photography and in coloring glass. The 235 isotope is used in atomic and hydrogen bombs and as a fuel… … Universalium
