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uranium    音标拼音: [jɚ'eniəm]
n. 铀

铀

uranium
n 1: a heavy toxic silvery-white radioactive metallic element;
occurs in many isotopes; used for nuclear fuels and nuclear
weapons [synonym: {uranium}, {U}, {atomic number 92}]

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
yellow oxide is used to impart to glass a delicate
greenish-yellow tint which is accompanied by a strong
fluorescence, and its black oxide is used as a pigment in
porcelain painting. Symbol U. Atomic weight 239.
[1913 Webster]

Note: Uranium was discovered in the state of an oxide by
Klaproth in 1789, and so named in honor of Herschel's
discovery of the planet Uranus in 1781.
[1913 Webster] Uran-ocher


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  • Uranium - Wikipedia
    Uranium is a chemical element; it has symbol U and atomic number 92 It is a silvery-grey metal in the actinide series of the periodic table A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons Uranium radioactively decays, usually by emitting an alpha particle
  • Uranium | Definition, Properties, Uses, Facts | Britannica
    uranium (U), radioactive chemical element of the actinoid series of the periodic table, atomic number 92 It is an important nuclear fuel Uranium constitutes about two parts per million of Earth’s crust
  • What is Uranium? | IAEA - International Atomic Energy Agency
    Uranium is a naturally occurring radioactive element, which has the atomic number of 92 and corresponds to the chemical symbol U in the periodic table It belongs to a special group of elements called “actinides” — elements that were discovered relatively late in history
  • What is Uranium? How Does it Work? - World Nuclear Association
    Uranium is a heavy metal which has been used as an abundant source of concentrated energy for over 60 years Uranium occurs in most rocks in concentrations of 2 to 4 parts per million and is as common in the Earth's crust as tin, tungsten and molybdenum Uranium occurs in seawater, and can be recovered from the oceans
  • Nuclear Fuel Facts: Uranium - Department of Energy
    Uranium is a silvery-white metallic chemical element in the periodic table, with atomic number 92 It is assigned the chemical symbol U A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons Uranium has the highest atomic weight of all naturally occurring elements
  • Uranium Enrichment: What It Is and Why It Matters
    Uranium enrichment is a pivotal process within the global energy landscape and holds significant geopolitical implications It is a critical step in preparing uranium for use, whether as fuel for
  • Uranium: Facts about the radioactive element that powers nuclear . . .
    Uranium is a radioactive metal central to one of the most devastating acts of war in history On Aug 6, 1945, a 10-foot-long (3 meters) bomb fell from the sky over the Japanese city of
  • Uranium - Element information, properties and uses | Periodic Table
    Element Uranium (U), Group 20, Atomic Number 92, f-block, Mass 238 029 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Uranium (U) Element: History, Properties, Reactions, Uses - Science Info
    Uranium, a metallic chemical element found in the periodic table with atomic number 92 and denoted by the symbol U, displays a silvery-white appearance Each uranium atom is characterized by 92 protons and 92 electrons, including 6 valence electrons Notably, uranium boasts the highest atomic weight among naturally occurring elements
  • WSGS - What is Uranium - Wyoming
    Uranium is a heavy metal that can be used as an abundant source of concentrated energy It usually occurs as an oxide; an example of a uranium mineral is uraninite (UO 2 ) Uranium metal is about 60 percent denser than lead and almost as dense as gold





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