uranium 235
noun Date: 1940 a light isotope of uranium of mass number 235 that constitutes less than one percent of natural uranium, that when bombarded with slow neutrons undergoes rapid fission into smaller atoms with the release of neutrons and energy, and that is used in nuclear reactors and atomic bombs

New Collegiate Dictionary. 2001.

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  • Uranium-235 — Уран 235 природный изотоп урана с атомной массой 235. Содержание урана 235 в природном уране 0,715 %, период полураспада 7,1·108 лет. Уран 235 является единственным делящимся материалом, существующим в природе. Термины атомной энергетики. Концерн …   Термины атомной энергетики

  • uranium 235 — n a light isotope of uranium of mass number 235 that when bombarded with slow neutrons undergoes rapid fission into smaller atoms with the release of neutrons and atomic energy …   Medical dictionary

  • Uranium-235 — Infobox isotope background = #fc6 text color = isotope name = Uranium 235 isotope filename = alternate names = mass number = 235 symbol =U num neutrons = 143 num protons = 92 abundance =0.72% halflife = 703,800,000 years error halflife = decay… …   Wikipedia

  • Uranium 235 — L uranium 235, noté 235U, est l isotope de l uranium dont le nombre de masse est égal à 235 : son noyau atomique compte 92 protons et 143 neutrons avec un spin 7/2 pour une masse atomique de 235,0439299 g/mol. Il est caractérisé par un excès …   Wikipédia en Français

  • uranium 235 — noun a uranium isotope with mass number 235; capable of sustaining chain reactions • Hypernyms: ↑uranium, ↑U, ↑atomic number 92 * * * noun : a light isotope of uranium of mass number 235 that is physically separable from natural uranium or is… …   Useful english dictionary

  • uranium 235 — Chem. the radioactive uranium isotope having a mass number of 235, comprising 0.715 percent of natural uranium. When bombarded with neutrons it undergoes fission with the release of energy. Also called U 235, U 235, actinouranium. [1935 40] * * * …   Universalium

  • uranium 235 — n. chem. the radioactive uranium isotope having a mass number of 235 and that undergoes fission with a release of energy when bombarded with neutrons • Etymology: 1935–40 …   From formal English to slang

  • uranium-235 — noun An isotope of uranium, used for energy generation and in atomic weapons, containing one hundred and forty three neutrons. It has a half life of 7·038×10 years, whereupon it decays into thorium 231 …   Wiktionary

  • 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

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