Magnesium

12
Mg
Gruppe
2
Periode
3
Blok
s
Protons
Electrons
Neutrons
12
12
12
General Properties
Atomnummer
12
Atommasse
24,305
Mass Number
24
Kategori
Jordalkalimetaller
Farve
Silver
Radioactive
Nej
From Magnesia, district in Thessaly
Krystalstruktur
Simpel Hexagonal
History
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.
Elektroner i hver skal
2, 8, 2
Elektronkonfiguration
[Ne] 3s2
Mg
When it burns in air, magnesium produces a brilliant white light
Physical Properties
Tilstandsform
Fast stof
Massefylde
1,738 g/cm3
Smeltepunkt
923,15 K | 650 °C | 1202 °F
Kogepunkt
1363,15 K | 1090 °C | 1994 °F
Smeltevarme
8,7 kJ/mol
Fordampningsvarme
128 kJ/mol
Varmefylde
1,023 J/g·K
Abundance in Earth's crust
2,9%
Abundance in Universe
0,06%
Magnesium
Billede akkrediteringer: Images-of-elements
Magnesium swarf in a glass jar
CAS Number
7439-95-4
PubChem CID Number
5462224
Atomic Properties
Atomradius
160 pm
Kovalent radius
141 pm
Elektronegativitet
1,31 (Paulings skala)
Ionization Potential
7,6462 eV
Atomic Volume
13,97 cm3/mol
Varmeledningsevne
1,56 W/cm·K
Oxidationstrin
1, 2
Applications
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
Isotoper
Stable Isotopes
24Mg, 25Mg, 26Mg
Unstable Isotopes
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg