Magnesium

12
Mg
Gruppe
2
Periode
3
Block
s
Protonen
Elektronen
Neutronen
12
12
12
Generelle Eigenschaften
Ordnungszahl
12
Atommasse
24,305
Massenzahl
24
Kategorie
Erdalkalimetalle
Farbe
Silber
Radioaktiv
Nein
From Magnesia, district in Thessaly
Kristallstruktur
Einfach hexagonal
Geschichte
Scottish chemist Joseph Black recognized magnesium as an element in 1755.

Magnesium was first isolated by Sir Humphry Davy in 1808, in London.

He used electrolysis on a mixture of magnesia and mercuric oxide.

Antoine Bussy prepared it in coherent form in 1831.
Elektronen pro Schale
2, 8, 2
Elektronenkonfiguration
[Ne] 3s2
Mg
When it burns in air, magnesium produces a brilliant white light
Physikalische Eigenschaften
Aggregatzustand
Fest
Dichte
1,738 g/cm3
Schmelzpunkt
923,15 K | 650 °C | 1202 °F
Siedepunkt
1363,15 K | 1090 °C | 1994 °F
Schmelzwärme
8,7 kJ/mol
Verdampfungswärme
128 kJ/mol
Spezifische Wärmekapazität
1,023 J/g·K
Häufigkeit in der Erdkruste
2,9%
Häufigkeit im Universum
0,06%
Magnesium
Danksagungen für Bilder: Images-of-elements
Magnesium swarf in a glass jar
CAS-Nummer
7439-95-4
PubChem CID Number
5462224
Atomeigenschaften
Atomradius
160 pm
Kovalenter Radius
141 pm
Elektronegativität
1,31 (Pauling-Skala)
Ionisierungsenergie
7,6462 eV
Molares Volumen
13,97 cm3/mol
Wärmeleitfähigkeit
1,56 W/cm·K
Oxidationszustände
1, 2
Anwendung
Magnesium is widely used in the manufacturing of mobile phones, laptop computers, cameras, and other electronic components.

The brilliant light it produces when ignited is made use of in photography, flares, pyrotechnics and incendiary bombs.

Magnesium compounds such as the hydroxide (milk of magnesia), sulfate (Epsom salts), chloride and citrate are used for medicinal purposes.
Because serious fires can occur, great care should be taken in handling magnesium metal
Isotope
Stabile Isotope
24Mg, 25Mg, 26Mg
Instabile Isotope
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg