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- Plutonium abstract "Plutonium is a transuranic radioactive chemical element with symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance 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. When exposed to moist air, it forms oxides and hydrides that expand the sample up to 70% in volume, which in turn flake off as a powder that is pyrophoric. It is radioactive and can accumulate in bones, which makes the handling of plutonium dangerous.Plutonium was first produced and isolated on December 14, 1940 by Dr. Glenn T. Seaborg, Joseph W. Kennedy, Edwin M. McMillan, and Arthur C. Wahl by deuteron bombardment of uranium-238 in the 60-inch cyclotron at the University of California, Berkeley. They first synthesized neptunium-238 (half-life 2.1 days) which subsequently beta-decayed to form a new heavier element with atomic number 94 and atomic weight 238 (half-life 87.7 years). It was fitting that element 94 be named after the next planetoid, Pluto following the precedents that uranium was named after the planet Uranus and neptunium after the planet Neptune.Wartime secrecy prevented them from announcing the discovery until 1948. Plutonium is the heaviest primordial element by virtue of its most stable isotope, plutonium-244, whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature; it is also the heaviest element to occur in nature. Plutonium is mostly a byproduct of nuclear reactions, where some of the neutrons released by the fission process convert uranium-238 nuclei into plutonium.Both plutonium-239 and plutonium-241 are fissile, meaning that they can sustain a nuclear chain reaction, leading to applications in nuclear weapons and nuclear reactors. Plutonium-240 exhibits a high rate of spontaneous fission, raising the neutron flux of any sample containing it. The presence of plutonium-240 limits a plutonium sample's usability for weapons or its quality as reactor fuel, and the percentage of plutonium-240 determines its grade (weapons-grade, fuel-grade, or reactor-grade). Plutonium-238 has a half-life of 88 years and emits alpha particles. It is a heat source in radioisotope thermoelectric generators, which are used to power some spacecraft. Plutonium isotopes are expensive and inconvenient to separate, so particular isotopes are usually manufactured in specialized reactors.Producing plutonium in useful quantities for the first time was a major part of the Manhattan Project during World War II, which developed the first atomic bombs. The Fat Man bombs used in the Trinity nuclear test in July 1945, and in the bombing of Nagasaki in August 1945, had plutonium cores. Human radiation experiments studying plutonium were conducted without informed consent, and several criticality accidents, some lethal, occurred after the war. Disposal of plutonium waste from nuclear power plants and dismantled nuclear weapons built during the Cold War is a nuclear-proliferation and environmental concern. Other sources of plutonium in the environment are fallout from numerous above-ground nuclear tests, now banned.".
- Plutonium wikiPageExternalLink end-of-plutonium.
- Plutonium wikiPageExternalLink getfile?00314607.pdf.
- Plutonium wikiPageExternalLink Plutonium.
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- Plutonium wikiPageWikiLink ALSEP.
- Plutonium wikiPageWikiLink Acid.
- Plutonium wikiPageWikiLink Actinide.
- Plutonium wikiPageWikiLink Acute_radiation_syndrome.
- Plutonium wikiPageWikiLink Advisory_Committee_on_Human_Radiation_Experiments.
- Plutonium wikiPageWikiLink Alamogordo,_New_Mexico.
- Plutonium wikiPageWikiLink Albert_Stevens.
- Plutonium wikiPageWikiLink Alkali.
- Plutonium wikiPageWikiLink Alkali_metal.
- Plutonium wikiPageWikiLink Alkaline_earth_metal.
- Plutonium wikiPageWikiLink Alkalis.
- Plutonium wikiPageWikiLink Allotrope.
- Plutonium wikiPageWikiLink Allotropes_of_plutonium.
- Plutonium wikiPageWikiLink Allotropy.
- Plutonium wikiPageWikiLink Alloy.
- Plutonium wikiPageWikiLink Alpha_decay.
- Plutonium wikiPageWikiLink Alpha_emission.
- Plutonium wikiPageWikiLink Alpha_particle.
- Plutonium wikiPageWikiLink Aluminium.
- Plutonium wikiPageWikiLink Americium.
- Plutonium wikiPageWikiLink Americium-241.
- Plutonium wikiPageWikiLink Anion.
- Plutonium wikiPageWikiLink Annealing_(metallurgy).
- Plutonium wikiPageWikiLink Apollo_12.
- Plutonium wikiPageWikiLink Apollo_Lunar_Surface_Experiments_Package.
- Plutonium wikiPageWikiLink Aqueous_solution.
- Plutonium wikiPageWikiLink Argon.
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- Plutonium wikiPageWikiLink Arthur_Wahl.
- Plutonium wikiPageWikiLink Artificial_cardiac_pacemaker.
- Plutonium wikiPageWikiLink Artificial_pacemaker.
- Plutonium wikiPageWikiLink Atomic_bomb.
- Plutonium wikiPageWikiLink Atomic_bombings_of_Hiroshima_and_Nagasaki.
- Plutonium wikiPageWikiLink Atomic_nucleus.
- Plutonium wikiPageWikiLink Atomic_number.
- Plutonium wikiPageWikiLink B_Reactor.
- Plutonium wikiPageWikiLink Barium.
- Plutonium wikiPageWikiLink Becquerel.
- Plutonium wikiPageWikiLink Berkeley_Radiation_Laboratory.
- Plutonium wikiPageWikiLink Bernard_Cohen_(physicist).
- Plutonium wikiPageWikiLink Beryllium.
- Plutonium wikiPageWikiLink Beta_decay.
- Plutonium wikiPageWikiLink Beta_emission.
- Plutonium wikiPageWikiLink Bill_Clinton.
- Plutonium wikiPageWikiLink Binding_energy.
- Plutonium wikiPageWikiLink Biological_half-life.
- Plutonium wikiPageWikiLink Boiling_point.
- Plutonium wikiPageWikiLink Bombing_of_Nagasaki.
- Plutonium wikiPageWikiLink Bone.
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- Plutonium wikiPageWikiLink Boride.
- Plutonium wikiPageWikiLink Borosilicate.
- Plutonium wikiPageWikiLink Borosilicate_glass.
- Plutonium wikiPageWikiLink Boulder,_Colorado.
- Plutonium wikiPageWikiLink Breeder_reactor.
- Plutonium wikiPageWikiLink Brookhaven_National_Laboratory.
- Plutonium wikiPageWikiLink Burnup.
- Plutonium wikiPageWikiLink Cadmium.
- Plutonium wikiPageWikiLink Caesium.
- Plutonium wikiPageWikiLink Calcium.
- Plutonium wikiPageWikiLink Cambridge.
- Plutonium wikiPageWikiLink Cancer.
- Plutonium wikiPageWikiLink Carbide.
- Plutonium wikiPageWikiLink Carbon.
- Plutonium wikiPageWikiLink Carbon_tetrachloride.
- Plutonium wikiPageWikiLink Cassini–Huygens.
- Plutonium wikiPageWikiLink Cast_iron.
- Plutonium wikiPageWikiLink Category:Actinides.
- Plutonium wikiPageWikiLink Category:Carcinogens.
- Plutonium wikiPageWikiLink Category:Chemical_elements.
- Plutonium wikiPageWikiLink Category:Manhattan_Project.