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plutonium 中文解釋 wordnet sense Collocation Usage
Noun
/plo͞oˈtōnēəm/,
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The chemical element of atomic number 94, a dense silvery radioactive metal of the actinide series, used as a fuel in nuclear reactors and as an explosive in nuclear fission weapons. Plutonium only occurs in trace amounts in nature but is manufactured in nuclear reactors from uranium-238,
  1. The chemical element of atomic number 94, a dense silvery radioactive metal of the actinide series, used as a fuel in nuclear reactors and as an explosive in nuclear fission weapons. Plutonium only occurs in trace amounts in nature but is manufactured in nuclear reactors from uranium-238


  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
  2. Plutonium is a transuranic radioactive chemical element with the chemical symbol Pu and atomic number 94. It is an actinide metal of silvery-white appearance that tarnishes when exposed to air, forming a dull coating when oxidized. ...
  3. In ancient Greek religious , a Ploutonion (Πλουτώνιον), Latinized as Plutonium, was a sanctuary dedicated to the god Plouton ("Pluto"), often in a location that produced and thus representing an entrance to the Underworld.
  4. A radioactive metallic element chemically similar to uranium.
  5. a heavy, man-made, radioactive metallic element. The most important isotope is Pu-239, which has a half-life of 24,000 years. Pu-239 can be used in reactor fuel and is the primary isotope in weapons. One kilogram is equivalent to about 22 million kilowatt-hours of heat energy. ...
  6. is a key nuclear material used in modern nuclear weapons and is also present as a byproduct in certain reprocessed fuels used in some nuclear reactors. Pu-239 is also produced in uranium reactors as a byproduct of fission of U-235.
  7. A transuranic element, formed in a nuclear reactor by neutron capture. It has several isotopes, some of which are fissile and some of which undergo spontaneous fission, releasing neutrons. ...
  8. a heavy, radioactive, man-made, metallic element (atomic number 94) used in the production of nuclear energy and the explosion of nuclear weapons; its most important isotope is fissile plutonium-239, produced by neutron irradiation of uranium-238.
  9. An artificial radioactive isotope that can be fabricated into nuclear fuel and fissioned in a reactor to produce energy.  Some plutonium isotopes also can be used in nuclear weapons..  Others can't.
  10. Symbol:"Pu" Atomic Number:"94" Atomic Mass: (244)amu. Plutonium is one of the elements in the actinide series of inner transition elements. It may be classified as a rare earth element. It is a radioactive and unstable element and you will find it in nuclear devices and reactors. ...
  11. A very heavy element formed when uranium-238 absorbs neutrons. Like uranium, it has two principal isotopes that are fissile.
  12. A highly toxic, heavy, radioactive metallic element. There are 15 isotopes of plutonium, of which only five are produced in significant quantities: plutonium-238, -239, -240, -241, and -242. ...
  13. A highly lethal radioactive element created from uranium to build atomic bombs starting in World War II.
  14. A man-made fissile element. Pure plutonium is a silvery metal that is heavier than lead. Material rich in the plutonium-239 isotope is preferred for manufacturing nuclear weapons, although almost any plutonium can be used.
  15. (in  plutonium (Pu) (chemical element))
  16. a metallic element that is used esp. as a fuel in the production of nuclear power, and in nuclear weapons.
  17. P-U. For more information on this and other elements, see The elements. And for fun, see Elements by Tom Lehrer. To see this song with captions, go to The Elements song by Tom Lehrer.
  18. An artificially produced element that is fissile and radioactive. It is created when an atom of uranium-238 captures a slow neutron in its nucleus.
  19. A silvery-white radioactive metal that exists as a solid under normal conditions. It is produced when uranium absorbs a neutron. Small amounts of plutonium occur in nature, but large amounts have been artificially produced in nuclear reactors. ...