Element Crystal mono

Plutonium • Actinide Rare Earth

Symbol: Pu
Date of discovery: 1940
Name origin: planet Pluto
Appearance: silver-white
Discoverer: G.T. Seaborg
Obtained from: uranium ores, man-made

Melting point: 913 K
Boiling point: 3503 K
Density[kg/m3]: 19816
Molar volume: 12.29 × 10-6 m3/mol
Protons/Electrons: 94
Neutrons: 150
Shell structure: 2,8,18,32,24,8,2
Electron configuration: [Rn]5f67s2
Oxidation state: 6,5,4,3
Crystal Structure: monoclinic

Named after the planet Pluto, plutonium was the second transuranium element of the actinide series discovered. Its appearance is silver-white, though it tarnishes to yellow when slightly oxidized. The isotope 239Pu has a half-life over 20,000 years; one kilogram produces over 20 million kilowatt hours of heat energy. Applications of plutonium include use as an explosive ingredient in nuclear weapons and as a key material in the development of nuclear power. Because of the energy given off by alpha decay, a large piece of plutonium is warm to the touch. Although plutonium occurs naturally in trace amounts, most existing plutonium has been created from fissile activity, particularly in nuclear power reactors.

 

Plutonium • Actinide Rare Earth

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