Europium
Chemical, physical and material properties and data of the chemical element Europium.
General Information about Europium
Regular nameEuropiumChemical symbolEuOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership
Atomar Properties of Europium
Atomic number Z63 = number of protonsStandard Atomic Weight151.964 (1)
Electron configuration of Europium
| 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 | 7 | 2 | 6 | | | 2 | | | | | |
Abbreviated form: [Xe] 4f7 6s2 .
Ionization Energies of Europium
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 Europium atom.
| IE1 | IE2 | IE3 | IE4 |
|---|
| 5.67038 | 11.25 | 24.92 | 42.7 |
Isotopic Data of Europium
An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Europium isotopes.
Chemistry of Europium
Oxidation states+3. +2Electronegativity1.1 (Pauling original)
1.20 (Pauling)Electron affinity0.116(13) eV
11.2(13) kJ mol-1
Standard Electrode Potential
| E0 (V) | Symbol | Nox | Name Ox.
Name Red. | Ox.
Red. | e- |
|---|
| -2.812 | Eu | + II
0 | Europium(II) cation
Europium | Eu2+
⇄ Eu (s) | + 2 e- |
| -0.35 | Eu | + III
+ II | Europium(III) cation
Europium(II) cation | Eu3+
⇄ Eu2+ | + e- |
Material and Physical Properties
Melting point822 °CEnthalpy of fusion (molar)9.21 kJ mol-1Boiling point1529 °CEnthalpy of vaporization175.7 kJ mol-1Density5.264 g cm-3 (20 °C)
External Data, Identifiers
CAS registry number7440-53-1InChI =1S/EuInChIKeyOGPBJKLSAFTDLK-UHFFFAOYSA-NPubChem ID23981
Last update: 2022-12-12
Perma link: https://www.chemlin.org/chemical-elements/europium.php
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