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plutonium    音标拼音: [plut'oniəm]
n. 钚

□

plutonium
n 1: a solid silvery grey radioactive transuranic element whose
atoms can be split when bombarded with neutrons; found in
minute quantities in uranium ores but is usually
synthesized in nuclear reactors; 13 isotopes are known with
the most important being plutonium 239 [synonym: {plutonium},
{Pu}, {atomic number 94}]

plutonium
Symbol: Pu
Atomic number: 94
Atomic weight: (242)
Dense silvery radioactive metallic transuranic element, belongs to the
actinoids. Pu-244 is the most stable isotope with a half-life of
7.6*10^7
years. Thirteen isotopes are known. Pu-239 is the most important, it
undergoes nuclear fission with slow neutrons and is hence important to
nuclear weapons and reactors. Plutonium production is monitored down to
the gram to prevent military misuse. First produced by Gleen T. Seaborg,
Edwin M. McMillan, J.W. Kennedy and A.C. Wahl in 1940.


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  • Plutonium - Wikipedia
    Plutonium is a chemical element; it has symbol Pu and atomic number 94 It is a silvery-gray actinide metal that tarnishes when exposed to air, and forms a dull coating when oxidized The element normally exhibits six allotropes and four oxidation states It reacts with carbon, halogens, nitrogen, silicon, and hydrogen
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    Plutonium (Pu), radioactive chemical element of the actinoid series of the periodic table, atomic number 94 It is the most important transuranium element because of its use as fuel in certain types of nuclear reactors and as an ingredient in nuclear weapons
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    Plutonium is the 94th element in the periodic table and one of the most dangerous elements on Earth Here we explore Plutonium in more detail
  • What Is Plutonium? | NRC. gov
    What is Plutonium? Printable Version Plutonium has five "common" isotopes, Pu-238, Pu-239, Pu-240, Pu-241, and Pu-242 All of the more common isotopes of plutonium are "fissionable"—which means the atom's nucleus can easily split apart if it is struck by a neutron The various isotopes of plutonium have been used in a number of applications
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    Plutonium is a solid material made into rods for use in nuclear reactors and into ceramic buttons for satellite systems Plutonium is a silvery-gray metal that becomes yellowish when exposed to air Most plutonium in the environment is in the form of microscopic particles
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    Iran's plutonium-path reactor hit in latest Israeli strike Despite repeated Iranian commitments to modify the facility for civilian low-enrichment plutonium production incompatible with weapons development, Tehran's political leadership deliberately avoided completing the conversion process, maintaining the infrastructure as leverage against Western powers
  • Physical, Nuclear, and Chemical Properties of Plutonium
    Plutonium belongs to the class of elements called transuranic elements whose atomic number is higher than 92, the atomic number of uranium Essentially all transuranic materials in existence are manmade The atomic number of plutonium is 94 Plutonium has 15 isotopes with mass numbers ranging from 232 to 246 Isotopes of the same element have
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    Plutonium is a radioactive metal that is silvery-gray in its pure state, although it oxidizes rapidly on contact with air, taking on yellow or brown hues It is a very dense and heavy element, with a density close to 19 8 g cm³, similar to that of uranium





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