Atomic Element Z = 94 • Actinide
Plutonium (Pu) — Atomic Data, Electron Shells & Reactions
Plutonium (symbol Pu, atomic number 94) has a standard atomic weight of 244 u and ground-state configuration [Rn] 5f6 7s2.
Atomic Number (Z)
94
IUPAC Symbol
Pu
Standard Atomic Weight
244 g/mol
Period / Group / Block
7 / f-block / f-block
Condensed Electron Config
[Rn] 5f6 7s2
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f6 6s2 6p6 7s2
Principal Shell Occupancy
[2, 8, 18, 32, 24, 8, 2]
Pauling Electronegativity
1.28
First Ionization Energy
585 kJ/mol
Covalent Radius
187 pm
Melting Point
912.5 K (639.35 °C)
Boiling Point
3501 K (3227.85 °C)
Density
19.84 g/cm³
Oxidation States
+4, +6, +3
Pu (Z=94) — Valence shell highlighted in vermilion