Astatine
Chemical, physical and material properties and data of the chemical element Astatine.
Contents
General Information about Astatine
Regular nameAstatineChemical symbolAtOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership
Atomar Properties of Astatine
Electron configuration of Astatine
| 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 | | 2 | 5 | | | | |
Shorthand electron configuration of Astatine: [Xe] 4f14 5d10 6s2 6p5 .
Ionization Energies of Astatine
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 Astatine atom.
| IE1 | IE2 | IE3 | IE4 | IE5 |
|---|
| 9.31751(8) | 20 | 29 | 41 | 51 |
Isotopic Data of Astatine
An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Astatine isotopes.
Chemistry of Astatine
Material and Physical Properties
Melting point302 °CEnthalpy of fusion (molar)23.8 kJ mol-1Boiling point337 °CEnthalpy of vaporization54.39 kJ mol-1Density6.35 g cm-3 (At2)
External Data, Identifiers
CAS registry number7440-68-8InChI =1S/AtInChIKeyRYXHOMYVWAEKHL-UHFFFAOYSA-NPubChem ID5460479
Last update: 2022-12-12
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