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Plutonium  SEE PERIODIC TABLE
see article  SEE FULL ARTICLE


Atomic Number94

Atomic SymbolPu

Atomic Weight[244 amu]

GroupRare Earth (Actinide Series)

FormSolid

Density @ STP19.7 g/cm3

Melting Point640 °C (1184 °F, 913.15 °K)

Boiling Point3228 °C (5842.4 °F, 3501.15 °K)

Heat of Fusion2.82 kJ/mol

Heat of Vaporization325 kJ/mol

First Ionization Potential6.06 eV

Electronegativity (on Pauling scale1.3

Ground State Electron Configuration5f6 6s2 6p6 6f2

Oxidation State(s)+3, +4, +5, +6

Selected Radioisotopes238Pu, 239Pu, 241Pu, 244Pu

Crystal StructureMonoclinic

Discovered bySeaborg; McMillan; Kennedy; Wahl, 1940

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