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Magnesium

Metalsolid
Symbol: Mg
Atomic number: 12
Atomic mass: 24.3050
Group: Alkali Earth Metal
CAS-number: 7439-95-4

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Physical data
Isotopes
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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 2
Orbitals: [Ne] 3s2
Electronegativity: 1.2, 1.2
1. Ionization potential: 7.6462 eV
2. Ionization potential: 15.035 eV
3. Ionization potential: 80.143 eV
Oxidation states: 2
Electrical conductivity: 0.226 10^6
Melting point: 648.8 °C
Boiling point: 1090 °C
Specific heat: 1.02 J/gK
Heat of fusion: 8.954 kJ/mol
Heat of vaporization: 127.40 kJ/mol
Thermal conductivity: 1.56 W/cmK
Atomic radius: 1.72 Å
Ionic radius: 0.72 Å (+2)
Covalent radius: 1.36 Å
Atomic volume: 13.97 cm³/mol
Density (293 K): 1.738 g/cm³
Crystal structure: hexagonal
hexagonal

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
24Mg 78.7 23.985 0 -- --
25Mg 10.13 24.9858 5/2 -- --
26Mg 11.17 25.9826 0 -- --
27Mg 0 27 1/2 9.45m β- View
28Mg 0 28 0 21.0h β- View

Other info

Name origin:Named after the ancient city Magnesia in the district of Thessaly, Greece
Description:Lightweight, malleable, silvery-white metal. Eighth most abundant element in the universe. Seventh most abundant element in the earth's crust.
Discovered by:Sir Humphrey Davy
Year:1808
Place:England
Sources:Usually obtained by electrolysis of melted magnesium chloride (MgCl2) found in sea water. Each cubic mile of seawater contains about 12 billion pounds of magnesium.
Use(s):Used in alloys to make airplanes, missiles and other uses for light metals. Has structural properties similar to aluminium. But because it is flammable at temperatures of burning gasoline, its uses are limited.