Xenon

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

Contents

General Information about Xenon

Regular nameXenonChemical symbolXeOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Xenon

Atomic number Z54 = number of protonsStandard Atomic Weight131.293 (6)

Electron configuration of Xenon

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		2	6

Shorthand electron configuration of Xenon: [Kr] 4d¹⁰ 5s² 5p⁶ .

Ionization Energies of Xenon

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 Xenon atom.

IE1	IE2	IE3
12.12984	20.9750	32.1230

Isotopic Data of Xenon

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

Chemistry of Xenon

Electronegativity
2.582 (Allen)
2.63 (Sanderson)
5.8121 eV (Gosh Gupta)Electron affinity-0.8(2) eV
-77(20) kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
0.99	Xe	+ VIII + VI	Perxenate anion Xenate anion	[XeO₆]^4- + 5 H⁺ ⇄ HXeO₄]^2- + 2 H₂O	+ 2 e^-
1.18	Xe	+ VIII 0	Hydrogenperxenate anion Xenon	[HXeO₆]^3- + 5 H₂O ⇄ Xe (g) + 11 OH^-	+ 8 e^-
1.24	Xe	+ VI 0	Xenate anion Xenon	[HXeO₄]^- + 3 H₂O ⇄ Xe (g) + 7 OH^-	+ 6 e^-
2.12	Xe	+ VI 0	Xenon(VI) oxide Xenon	XeO₃ (aq) + 6 H⁺ ⇄ Xe (g) + 3 H₂O	+ 6 e^-
2.18	Xe	+ VIII 0	Perxenic acid Xenon	H₄XeO₆ (aq) + 8 H⁺ ⇄ Xe (g) + 6 H₂O	+ 8 e^-
2.32	Xe	+ II 0	Xenon difluoride Xenon	XeF₂ (aq) + 2 H⁺ ⇄ Xe (g) + 2 HF (aq)	+ 2 e^-
2.42	Xe	+ VIII + VI	Perxenonic acid Xenon(VI) oxide	H₄XeO₆ (aq) + 2 H⁺ ⇄ XeO₃ (aq) + 3 H₂O	+ 2 e^-

Material and Physical Properties

Melting point- 111.75 °CEnthalpy of fusion (molar)2.27 kJ mol^-1Boiling point- 108.099 °CEnthalpy of vaporization12.65 kJ mol^-1Density5.894 g L ^-1 (0°C; 101.325 kPa)

External Data, Identifiers

CAS registry number7440-63-3InChI =1S/XeInChIKeyFHNFHKCVQCLJFQ-UHFFFAOYSA-NPubChem ID23991

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Last update: 2022-12-12

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