Krypton

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

Contents

General Information about Krypton

Regular nameKryptonChemical symbolKrOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Krypton

Atomic number Z36 = number of protonsStandard Atomic Weight83.798 (2)

Electron configuration of Krypton

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

Shorthand electron configuration of Krypton: [Ar] 3d¹⁰ 4s² 4p⁶ .

Ionization Energies of Krypton

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 Krypton atom.

IE1	IE2	IE3	IE4	IE5	IE6	IE7	IE8
13.999605	24.35984	36.950	52.49	64.69	78.49	111.0	125.802

Isotopic Data of Krypton

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

Chemistry of Krypton

Oxidation states0Electronegativity3.0 (Pauling original)
3.00 (Pauling)
2.966 (Allen)
3.17 (Sanderson)
6.3916 eV (Gosh Gupta)Electron affinity-1.0(2) eV
-96(20) kJ mol^-1

Material and Physical Properties

Melting point- 157.37 °CEnthalpy of fusion (molar)1.64 kJ mol^-1Boiling point- 153.415 °CEnthalpy of vaporization9.08 kJ mol^-1Density3.749 g L ^-1 (0°C; 101.325 kPa)

External Data, Identifiers

CAS registry number7439-90-9InChI =1S/KrInChIKeyDNNSSWSSYDEUBZ-UHFFFAOYSA-NPubChem ID5416

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Last update: 2022-12-12

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