Magnesium

12
Mg
Grupp
2
Period
3
Block
s
Protoner
Elektroner
Neutroner
12
12
12
Generella Egenskaper
Atomnummer
12
Atommassa
24,305
Masstal
24
Kategori
Alkaliska jordmetaller
Färg
Silver
Radioaktiv
Nej
From Magnesia, district in Thessaly
Kristallstruktur
Enkelt hexagonalt
Historia
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 per skal
2, 8, 2
Elektronkonfiguration
[Ne] 3s2
Mg
When it burns in air, magnesium produces a brilliant white light
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
1,738 g/cm3
Smältpunkt
923,15 K | 650 °C | 1202 °F
Kokpunkt
1363,15 K | 1090 °C | 1994 °F
Smältvärme
8,7 kJ/mol
Ångbildningsvärme
128 kJ/mol
Specifik värmekapacitet
1,023 J/g·K
Abundance in Earth's crust
2,9%
Abundance in Universe
0,06%
Magnesium
Bildkrediter: Images-of-elements
Magnesium swarf in a glass jar
CAS Number
7439-95-4
PubChem CID Number
5462224
Atomära Egenskaper
Atomradie
160 pm
Kovalent radie
141 pm
Elektronegativitet
1,31 (Paulingskalan)
Jonisationspotential
7,6462 eV
Molvolym
13,97 cm3/mol
Värmeledningsförmåga
1,56 W/cm·K
Oxidationstillstånd
1, 2
Användningsområden
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
Stabila isotoper
24Mg, 25Mg, 26Mg
Instabila isotoper
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg