plutonium$61800$ - ορισμός. Τι είναι το plutonium$61800$
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Τι (ποιος) είναι plutonium$61800$ - ορισμός

Isotopes of Plutonium; Plutonium-243; Plutonium-228; Plutonium-229; Plutonium-230; Plutonium-231; Plutonium-232; Plutonium-233; Plutonium-234; Plutonium-235; Plutonium-236; Plutonium-237; Plutonium-245; Plutonium-246; Plutonium-247; Plutonium isotopes; Plutonium isotope
  • A pellet of [[plutonium-238]], glowing from its own heat, used for [[radioisotope thermoelectric generator]]s.
  • criticality]].
  • doi-access=free }}</ref><br/>Transmutation speed not shown and varies greatly by nuclide.<br/><sup>245</sup>Cm&ndash;<sup>248</sup>Cm are long-lived with negligible decay.

Plutonium         
RADIOACTIVE CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 94 AND SYMBOL PU
Element 94; Plutonium (Pu); Plutium; Transporting plutonium; Pu (element); Natural Plutonium; Plutonium metallurgy; History of plutonium
Plutonium is a radioactive chemical element with the 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.
plutonium         
RADIOACTIVE CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 94 AND SYMBOL PU
Element 94; Plutonium (Pu); Plutium; Transporting plutonium; Pu (element); Natural Plutonium; Plutonium metallurgy; History of plutonium
¦ noun 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. (Symbol: Pu)
Origin
1940s: from Pluto, on the pattern of neptunium (Pluto being the next planet beyond Neptune).
plutonium         
RADIOACTIVE CHEMICAL ELEMENT WITH THE ATOMIC NUMBER OF 94 AND SYMBOL PU
Element 94; Plutonium (Pu); Plutium; Transporting plutonium; Pu (element); Natural Plutonium; Plutonium metallurgy; History of plutonium
Plutonium is a radioactive element used especially in nuclear weapons and as a fuel in nuclear power stations.
N-UNCOUNT

Βικιπαίδεια

Isotopes of plutonium

Plutonium (94Pu) is an artificial element, except for trace quantities resulting from neutron capture by uranium, and thus a standard atomic weight cannot be given. Like all artificial elements, it has no stable isotopes. It was synthesized long before being found in nature, the first isotope synthesized being 238Pu in 1940. Twenty plutonium radioisotopes have been characterized. The most stable are plutonium-244 with a half-life of 80.8 million years, plutonium-242 with a half-life of 373,300 years, and plutonium-239 with a half-life of 24,110 years. All of the remaining radioactive isotopes have half-lives that are less than 7,000 years. This element also has eight meta states; all have half-lives of less than one second.

The isotopes of plutonium range in atomic weight from 228.0387 u (228Pu) to 247.074 u (247Pu). The primary decay modes before the most stable isotope, 244Pu, are spontaneous fission and alpha emission; the primary mode after is beta emission. The primary decay products before 244Pu are isotopes of uranium and neptunium (not considering fission products), and the primary decay products after are isotopes of americium.