Uranium-238 — Уран 238 природный изотоп урана с атомной массой 238. Содержание урана 238 в природном уране 99,28%, период полураспада 4,5·109 лет. Уран 238 подвергается ядерному делению под действием быстрых нейтронов и может использоваться в качестве… … Термины атомной энергетики
Uranium-238 — Infobox isotope background =#fc6 text color = image caption = 10 gram sample alternate names = mass number =238 symbol =U num neutrons =146 num protons =92 abundance = 99.284% halflife = 4.46 billion years error halflife = decay product = Thorium … Wikipedia
Uranium 238 — L uranium 238, noté 238U, est l isotope de l uranium dont le nombre de masse est égal à 238 : son noyau atomique compte 92 protons et 146 neutrons avec un spin 0+ pour une masse atomique de 238,0507826 g/mol. Il est caractérisé par un excès… … Wikipédia en Français
uranium 238 — noun the commonest isotope of uranium; it is not fissionable but when irradiated with neutrons it produces fissionable plutonium 239 • Hypernyms: ↑uranium, ↑U, ↑atomic number 92 * * * noun : an isotope of uranium of mass number 238 that is the… … Useful english dictionary
uranium-234-uranium–238 dating — Method of age determination that makes use of the radioactive decay of uranium 238 to uranium 234; the method can be used for dating sediments from either a marine or a playa lake environment. Because this method is useful for the period с… … Universalium
uranium-234–uranium-238 dating — method of age determination that makes use of the radioactive decay of uranium 238 to uranium 234; the method can be used for dating of sediments from either a marine or a playa lake environment. Because this method is useful for the period … Universalium
uranium 238 — Chem. the radioactive uranium isotope having a mass number 238, comprising 99.28 percent of natural uranium: used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239. Also called U 238, U 238. [1940 45] * * * … Universalium
uranium 238 — n. chem. the radioactive uranium isotope having a mass number of 238, used chiefly in nuclear reactors as a source of the fissionable isotope plutonium 239 • Etymology: 1940–45 … From formal English to slang
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