Plutonium

Chemical, physical and material properties and data of the chemical element Plutonium.

Content

General data

Atomar properties

Electron configutation

General Information about Plutonium

Regular namePlutoniumChemical symbolPuOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Plutonium

Atomic number Z94 = number of protonsStandard Atomic Weight244.064205302

Electron configuration of Plutonium

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	6	2	6	10	2	6	10	14	2	6	10	6	2	6			2

Abbreviated form: [Rn] 5f⁶ 7s² .

Ionization Energies of Plutonium

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volts (eV) per atom to separate a given electron from an Plutonium atom.

IE1	IE2
6.0260	11.2

Isotopic Data of Plutonium

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Plutonium isotopes.

Chemistry of Plutonium

Oxidation states+ 4Electronegativity1.3 (Pauling original)
1.28 (Pauling)Electron affinity-0.5 eV
-48.33 kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-2.031	Pu	+III 0	Plutonium(III) cation Plutonium	Pu³⁺ ⇄ Pu (s)	+ 3 e^-
1.006	Pu	+ IV + III	Plutonium(IV) cation Plutonium(III) cation	Pu⁴⁺ ⇄ Pu³⁺	+ e^-
1.099	Pu	+ V + IV	Plutonium(V) cation Plutonium(IV) cation	Pu⁵⁺ ⇄ Pu⁴⁺	+ e^-

Material and Physical Properties

Melting point639.4 °CEnthalpy of fusion (molar)2.82 kJ mol^-1Boiling point3228 °CEnthalpy of vaporization343.5 kJ mol^-1Density19.816 g cm^-3

External Data, Identifiers

CAS registry number7440-07-5InChI =1S/PuInChIKeyOYEHPCDNVJXUIW-UHFFFAOYSA-NPubChem ID23940

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isotopes

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Last update: 2022-12-12

Perma link: https://www.chemlin.org/chemical-elements/plutonium.php