• Class: Trans-Uranium AcTinides
• Period: 7
• IUPAC group: 3
• Traditional: IIIa

• Discovered in: 1940 by Seaborg et. al.
• Origin of name: The planet Pluto
• Historical or alternate name:

Traces in Uranium ores

Silvery metal. Reacts with Oxygen and acids; resists alkalis. Attacked by steam.

• Atmosphere: ~0.0 ppm
• Primitive mantle: ~0.0 ppm
• Sea water: ~0.0 ppm
• Metallic meteorite: ~0.0 ppm
• ConTinental crust: ~0.0 ppm
• Solar photosphere: ~0.0 log of abundance
• Oceanic crust: ~0.0 ppm
• Solar system: ~0.0 relative to Si=1.0e6

   Hazards

Highly toxic. Radioactive. Extremely low permissible exposure levels..

• Lower:
• Upper:

Plutonium Physical Properties

 Transitional Data

• State: Solid
• Density: 19.84 g/cm3

 Molar enthalpy

• Atomization: 348.0 kJ mol-1
• Fusion: 2.8 kJ mol-1
• Vaporization: 343.5 kJ mol-1

 Transition points

• MelTing point: 914.0 K
• Boiling point: 3505.0 K
• Critical temperature: 11140.0 K

 Molar properties

• Atomic weight: 244.0642 g/mole
• Molar volume: 12.12 cm3 mol-1

 Crystal structure sequence

monoclinic <395 K < 508 K < orthorhombic < 592 K < face-centered-cubic < 723 K < body-centered-tetragonal < 749 K < body-centered-cubic < melTing point

 Thermodynamics

 Miscellaneous physical

• Electrical resistivity: 150.0 µ-ohms/cm
• Debye temperature: 162.0 K
• Thermal conductivity: 6.74 W / m / K
• Coefficient of linear expansion: 54.0Coef. per K
• Mass magnetic susceptibility: 3.17e-8
• X-ray diffraction mass absorption coefficients:
• CuK: (µ/p)/cm2 g-1
• MoK: (µ/p)/cm2 g-1

Plutonium Chemical Properties

 Chemical basics:

• Oxidation states: +3 +4 +5 +6
• Molecular wt: 244.0642 g/mole

 Radii

• Covalent: pm
• Atomic: 159.0 pm
• Van der Waals: pm

 Ions:

• ion: +3 pm 100.0
• ion: +4 pm 86.0
• ion: +5 pm 74.0
• ion: +6 pm 71.0

 Covalent bonds

 Effective nuclear charge

• Slater: 1.65
• Clementi:
• Froese-Fischer:

 Electronegativity

• Pauling:
• Allred-Rochow: 1.22

 Standard reactions

Plutonium Nuclear Properties

• Known 16
• Listed 9

• Known 232 - 246
• Listed 236 - 246

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 2.85 years
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 45.30 days
  • Decay mode: E.C. alpha,
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 87.70 years
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA: 9.16
• Nuclear spin/Quantum no.: 1/2
• Radioisotopes:
  • Half-life: 241.00 centuries
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 65.50 years
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.: 5/2
• Radioisotopes:
  • Half-life: 14.40 years
  • Decay mode: Beta- alpha,
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 0.38 E6 years
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 82.60 E6 years
  • Decay mode: alpha, S.F.
  • Source:
• Notes

• % Occ.:Natural
• Mossbauer NRA:
• Nuclear spin/Quantum no.:
• Radioisotopes:
  • Half-life: 10.90 days
  • Decay mode: Beta-
  • Source:
• Notes

• Isotope 244Cross-section 1.8±0.3 barns

• Absolute sensitivity: 1H=1.0
• Relative sensitivity: 1H=1.0
• Receptivity: 13C=1.0
• Magnetogyric ratio: 0.972e7 rad / T / s
• Quadropole moment: m2
• Frequency: 3.63 MHz
• Reference:

Plutonium Energy Properties

Electrons

• Ground state electron configuration: [Rn] 5f6 7s2
• Electron affinity: kJ mol-1
• Filling orbitals:

 Ionization energies

 Atomic energy levels