Look up: plutonium

1. Plutonium
   A radioactive metallic element chemically similar to uranium.
   Found on http://www.epa.gov/OCEPAterms/
   
   
2. plutonium
   [n] - a radioactive transuranic element that is similar to uranium
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. Plutonium
   A product of the radioactive decay of neptunium. Symbol Pu
   Found on http://www.diracdelta.co.uk/science/sour
   
   
4. Plutonium
   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. Weapons-grade plutonium is produced in special reactors to give >90% Pu-239, reactor-grade plutonium contains a...
   Found on http://www.encyclo.co.uk/local/20725
   
   
5. Plutonium
   A heavy artificially produced radioactive metal with 15 isotopes. It has an atomic number of 94.
   Found on http://www.contractorsunlimited.co.uk/to
   
   
6. Plutonium
   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. Weapons-grade plutonium is produced in special reactors to give >90% Pu-239, reactor-grade plutonium contains about 30% non-fissile isotopes. About one third of …
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7. Plutonium
   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.
   Found on http://www.theiet.org/factfiles/energy/n
   
   
8. plutonium
   chemical element:atomic number 94 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
9. plutonium
   <chemical> Plutonium. A naturally radioactive element of the actinide metals series. It has the atomic symbol pu, atomic number 94, and atomic weight 242. Plutonium is used as a nuclear fuel, to produce radioisotopes for research, in radionuclide batteries for pacemakers, and as the agent of f...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
10. plutonium
    Pu noun 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...
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11. plutonium
    (Pu) (ploo-to´ne-әm) a chemical element, atomic number 94, atomic weight 242.
    Found on http://www.encyclo.co.uk/local/21001
    
    
12. plutonium
    radioactive chemical element of the actinoid series of the periodic table, atomic number 94. It is the most important transuranium element because of ... [11 related articles]
    Found on http://www.britannica.com/eb/a-z/p/81
    
    
13. Plutonium
    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. Weapons-grade plutonium is produced with >90% Pu-239, reactor-grade plutonium contains about 30% non-fissile isotopes.
    Found on http://www.encyclo.co.uk/local/21076
    
    
14. plutonium
    plutonium (plOOtō'nēum) , radioactive chemical element; symbol Pu; at. no. 94; mass no. of most stable isotope 244; m.p. 641°C; b.p. 3,232°C; sp. gr. 19.84 at 20°C; valence +3, +4, +5, or +6. Plutonium is a silver-gray radioactive metal that has six allotropic forms (see ...
    Found on http://www.infoplease.com/ce6/sci/A08394
    
    
15. Plutonium
    Plutonium is a radioactive metal element with the symbol Pu. It was discovered by the chemists Glenn Seaborg and Edwin McMillan in 1940. The isotopes of plutonium were first prepared and studied by Seaborg and his associates in 1941. Trace amounts of the element have since been found in uranium ores...
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16. plutonium
    (Pu) Type: Term Pronunciation: plū-tō′nē-ŭm Definitions: 1. A transuranium artificial radioactive element, atomic no. 94, atomic wt. 244.064. The best-known α-emitting isotope is 239Pu (half-life 24,110 years) which, like 235U, is fissionable and can be used in ...
    Found on http://www.medilexicon.com/medicaldictio
    
    
17. plutonium
    Silvery-white, radioactive, metallic element of the actinide series, atomic number 94, relative atomic mass 239.13. It occurs in nature in minute quantities in pitchblende and other ores, but is produced in quantity only synthetically. It has six allotropic forms (see allotropy) and is one of the fissile elements (elements capable of splitting ...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
18. Plutonium
    `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. The element normally exhibits six allotropes and four oxidat...
    Found on http://en.wikipedia.org/wiki/Plutonium