Magnesium
Chemical, physical and material properties and data of the chemical element Magnesium.
General Information about Magnesium
Regular nameMagnesiumChemical symbolMgOther namesSystematic nameHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership
Atomar Properties of Magnesium
Atomic number Z12 = number of protonsStandard Atomic Weight24.305
intervall: [24.304, 24.307]
Electron configuration of Magnesium
| 1s | 2s | 2p | 3s | 3p | 3d | 4s | 4p | 4d | 4f | 5s | 5p | 5d | 5f | 6s | 6p | 6d | 6f | 7s | 7p |
|---|
| 2 | 2 | 6 | 2 | | | | | | | | | | | | | | | | |
Abbreviated form: [Ne] 3s2 .
Ionization Energies of Magnesium
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 Magnesium atom.
| IE1 | IE2 | IE3 | IE4 | IE5 | IE6 | IE7 | IE8 |
|---|
| 7.646235 | 15.03527 | 80.1437 | 109.2655 | 141.27 | 186.76 | 225.02 | 265.96 |
Isotopic Data of Magnesium
An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Magnesium isotopes.
Chemistry of Magnesium
Oxidation states+2Electronegativity1.2 (Pauling original)
1.31 (Pauling)
1.293 (Allen)
1.42 (Sanderson)
1.23 (Allred-Rochow)
3.6108 eV (Gosh Gupta)
3.75 eV (Pearson)Electron affinity-0.4(2) eV
-40(19) kJ mol-1
Standard Electrode Potential
| E0 (V) | Symbol | Nox | Name Ox.
Name Red. | Ox.
Red. | e- |
|---|
| -2.372 | Mg | + II
0 | Magnesium(II) cation
Magnesium | Mg2+
⇄ Mg (s) | + 2 e- |
Material and Physical Properties
Melting point650 °CEnthalpy of fusion (molar)8.48 kJ mol-1Boiling point1090 °CEnthalpy of vaporization128.7 kJ mol-1Density1.738 g cm-3 (20°C)
External Data, Identifiers
CAS registry number7439-95-4InChI =1S/MgInChIKeyFYYHWMGAXLPEAU-UHFFFAOYSA-NPubChem ID5462224
Last update: 2022-12-12
Perma link: https://www.chemlin.org/chemical-elements/magnesium.php
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