Plutonium

Plutonium is a chemical element; it has symbol Pu and atomic number 94. It is a silvery-gray actinide metal that tarnishes when exposed to air, and forms a dull... Wikipedia

• Name, symbol:  plutonium, Pu
• Pronunciation:  -nee-əm]]
• Appearance:  silvery white, tarnishing to dark gray in air
• Oxidation states:  8, 7, 6, 5, 4, 3, 2, 1 ​(an amphoteric oxide)
• Electronegativity:  Pauling scale: 1.28
• energies:  1st: 584.7 kJ/mol
• Atomic radius:  empirical: 159 pm
• Covalent radius:  187±1 pm
• Crystal structure:  ​monoclinic
• Speed of sound:  2260 m/s
• Thermal expansion:  46.7 µm/(m·K) (at 25 °C)
• Thermal conductivity:  6.74 W/(m·K)
• Electrical resistivity:  1.460 µΩ·m (at 0 °C)
• Magnetic ordering:  paramagnetic
• Young's modulus:  96 GPa
• Shear modulus:  43 GPa
• Poisson ratio:  0.21
• CAS Number:  7440-07-5
• Naming:  after dwarf planet Pluto, itself named after classical god of the underworld Pluto
• Discovery:  Glenn T. Seaborg, Arthur Wahl, Joseph W. Kennedy, Edwin McMillan (1940–1)
• Data source:  DuckDuckGo