Plutonium

Actinide · 244.06420 u · group 3, period 7

Plutonium · Pu

Atomic number94

SymbolPu

CategoryActinide

Standard stateSolid

Group · Period · Block3 · 7 · f

Electron configuration[Rn]7s2 5f6

Atomic mass244.06420 u

Atomic radius243 pm

Protons / Neutrons / Electrons94 / 150 / 94

Shells (e⁻ per shell)2, 8, 18, 32, 24, 8, 2

Electronegativity (Pauling)1.28

Ionization energy6.06 eV

Electron affinity—

Oxidation states+6, +5, +4, +3

Melting point913 K · 639.9 °C

Boiling point3.50e+3 K · 3.23e+3 °C

Density19.84 g/cm³

Year discovered1940

CPK color

#006BFF

State at room temp (25 °C)

solid

Position