Magnesium
12
Mg
Gruppe
2
Periode
3
Blok
s
Protoner
Elektroner
Neutroner
12
12
12
Generelle Egenskaber
Atomnummer
12
Atommasse
24,305
Masseantal
24
Kategori
Jordalkalimetaller
Farve
Sølv
Radioaktiv
Nej
From Magnesia, district in Thessaly
Krystalstruktur
Simpel Hexagonal
Historie
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.
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
When it burns in air, magnesium produces a brilliant white light
Fysiske Egenskaber
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
Forekomst i jordskorpen
2,9%
Forekomst i universet
0,06%
CAS-nummer
7439-95-4
PubChem CID-nummer
5462224
Atomare egenskaber
Atomradius
160 pm
Kovalent radius
141 pm
Elektronegativitet
1,31 (Paulings skala)
Ioniseringspotentiale
7,6462 eV
Atomvolumen
13,97 cm3/mol
Varmeledningsevne
1,56 W/cm·K
Oxidationstrin
1, 2
Anvendelser
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.
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
Stabile isotoper
24Mg, 25Mg, 26MgUstabile isotoper
19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg