Palladium

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

Contents

General Information about Palladium

Regular namePalladiumChemical symbolPdOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Palladium

Atomic number Z46 = number of protonsStandard Atomic Weight106.42 (1)

Electron configuration of Palladium

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		..

Shorthand electron configuration of Palladium: [Kr] 4d¹⁰ .

Ionization Energies of Palladium

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

IE1	IE2	IE3
8.3369	19.43	32.93

Isotopic Data of Palladium

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

Chemistry of Palladium

Oxidation states+2Electronegativity2.2 (Pauling original)
2.20 (Pauling)
1.59 (Allen)
3.5727 eV (Gosh Gupta)
4.45 eV (Pearson)Electron affinity0.562 14(12) eV
54.24(2) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
0.07	Pd	+ II 0	Palladium(II) hydroxide Palladium	Pd(OH)₂ ⇄ Pd (s) + 2 OH^-	+ 2 e^-
0.591	Pd	+ II 0	Tetrachloropalladate(II) Palladium	[PdCl₄]^2- ⇄ Pd (s) + 4 Cl^-	+ 2 e^-
0.951	Pd	+ II 0	Palladium(II) cation Palladium	Pd²⁺ ⇄ Pd (s)	+ 2 e^-
1.288	Pd	+ IV + II	Hexachloropalladate(IV) Palladium	[PdCl₆]^2- ⇄ [PdCl₄]^2- + 2 Cl^-	+ 2 e^-

Material and Physical Properties

Melting point1554.8 °CEnthalpy of fusion (molar)16.74 kJ mol^-1Boiling point2963 °CEnthalpy of vaporization393.3 kJ mol^-1Density12.023 g cm^-3

External Data, Identifiers

CAS registry number7440-05-3InChI =1S/PdInChIKeyKDLHZDBZIXYQEI-UHFFFAOYSA-NPubChem ID23938

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Last update: 2022-12-12

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