Argon
Chemical, physical and material properties and data of the chemical element Argon.
General Information about Argon
Regular nameArgonChemical symbolArOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership
Atomar Properties of Argon
Atomic number Z18 = number of protonsStandard Atomic Weight39.88
intervall: [39.792, 39.963]
Electron configuration of Argon
| 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 | | | | | | | | | | | | | | | |
Abbreviated form: [Ne] 3s2 3p6 .
Ionization Energies of Argon
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 Argon atom.
| IE1 | IE2 | IE3 | IE4 | IE5 | IE6 | IE7 | IE8 |
|---|
| 15.759610 | 27.62966 | 40.74 | 59.81 | 75.02 | 91.009 | 124.323 | 143.46 |
Isotopic Data of Argon
An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Argon isotopes.
Chemistry of Argon
Electronegativity
3.242 (Allen)
3.92 (Sanderson)
7.6515 eV (Gosh Gupta)Electron affinity-1.0(2) eV
-96(20) kJ mol-1
Material and Physical Properties
Melting point- 189.34 °CEnthalpy of fusion (molar)1.18 kJ mol-1Boiling point- 185.848 °CEnthalpy of vaporization6.53 kJ mol-1Density1.784 g L -1 (0°C; 101.325 kPa)
External Data, Identifiers
CAS registry number7440-37-1InChI =1S/ArInChIKeyXKRFYHLGVUSROY-UHFFFAOYSA-NPubChem ID23968
Last update: 2022-12-12
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