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uranium
[yoo-rey-nee-uhm]
noun
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 in nuclear reactors. U; 238.03; 92; 19.07.
uranium
/ ʊˈɪɪə /
noun
a radioactive silvery-white metallic element of the actinide series. It occurs in several minerals including pitchblende, carnotite, and autunite and is used chiefly as a source of nuclear energy by fission of the radioisotope uranium-235 . Symbol: U; atomic no: 92; atomic wt: 238.0289; half-life of most stable isotope, 238 U: 451 × 10 9 years; valency: 2-6; relative density: 18.95 (approx.); melting pt: 1135°C; boiling pt: 4134°C
uranium
A heavy, silvery-white, highly toxic, radioactive metallic element of the actinide series. It has 14 known isotopes, of which U 238 is the most naturally abundant, occurring in several minerals. Fissionable isotopes, especially U 235, are used in nuclear reactors and nuclear weapons. Atomic number 92; atomic weight 238.03; melting point 1,132°C; boiling point 3,818°C; specific gravity 18.95; valence 2, 3, 4, 5, 6.
See Periodic Table
uranium
A chemical element that is naturally radioactive. An isotope of uranium, uranium 235, is the main fuel for nuclear reactors and atomic bombs (see also atomic bomb). Its symbol is U. (See fission and chain reaction.)
51Թ History and Origins
51Թ History and Origins
Origin of uranium1
Example Sentences
Israel has struck dozens of targets across Iran, damaging the uranium enrichment plant at Natanz and assassinating top military commanders and nuclear scientists in Tehran.
What if its 400kg of 60% enriched uranium – the nuclear fuel that is just a small step away from being fully weapons-grade, enough for ten bombs or so – is not destroyed?
Israel’s negotiating position has long been entirely maximalist: Every nuclear complex on Iranian soil must be destroyed, and under no circumstances could Iran be left with even a rudimentary uranium enrichment capability.
Among the other sites hit is Iran's main uranium enrichment facility at Natanz, in the centre of the country.
There is a sympathetic president in the White House and lastly, Israel reportedly feared that some of Iran's key uranium enrichment equipment was about to be moved deep underground.
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