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1 uranium
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2 element
['eləmənt]1) (an essential part of anything: Sound teaching of grammar is one of the elements of a good education.) základní součást2) (a substance that cannot be split by chemical means into simpler substances: Hydrogen, chlorine, iron and uranium are elements.) prvek3) (surroundings necessary for life: Water is a fish's natural element.) živel4) (a slight amount: an element of doubt.) nádech5) (the heating part in an electric kettle etc.) tělísko•- elements
- in one's element* * *• živel• prvek• element -
3 radioactive
[reidiəu'æktiv]1) ((of some substances, eg uranium) giving off rays which can be dangerous, but which can also be used in eg medicine: radioactive metals.) radioaktivní2) (containing radioactive substances: radioactive waste/dust.) radioaktivní•* * *• radioaktivní
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