plutonium

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Symbol:

Pu

Atomic Number:

94

Relative Atomic Mass:

244.0642 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

2 x 10^-19% (mass fraction)

Electron Configuration:

[Rn]5f⁶7s²

Oxidation States:

VI, V, IV, III

Atomic Radius:

151.3pm

Ionic Radius:

72pm (for +6 oxidation state)

86pm (for +4 oxidation state)

100pm (for +3 oxidation state)

Melting Point:

1772°C

Density:

21.45 g cm^-3 (at 20°C)

First Ionisation Energy:

9.0 eV

Reduction Potential:

-2.031V

for Pu³⁺ + 3e^- a Pu_(s)

Electronegativity (Allred and Rochow):

1.2