Магнезиум

12
Mg
Група
2
Периода
3
блок
s
Protons
Electrons
Neutrons
12
12
12
Општи Својства
Атомски број
12
Атомска тежина
24,305
Mass Number
24
Category
Земноалкален метал
Color
Silver
Radioactive
Не
From Magnesia, district in Thessaly
Кристална структура
Simple 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.
Electrons per shell
2, 8, 2
Електронска конфигурација
[Ne] 3s2
Mg
When it burns in air, magnesium produces a brilliant white light
Физички Својства
Фаза
Solid
Густина
1,738 g/cm3
Точка на топење
923,15 K | 650 °C | 1202 °F
Точка на вриење
1363,15 K | 1090 °C | 1994 °F
Топлина на топење
8,7 kJ/mol
Топлина на испарување
128 kJ/mol
Specific Heat Capacity
1,023 J/g·K
Abundance in Earth's crust
2,9%
Abundance in Universe
0,06%
Magnesium
Кредити на слика: Images-of-elements
Magnesium swarf in a glass jar
CAS Number
7439-95-4
PubChem CID Number
5462224
Атомски Својства
Атомски полупречник
160 pm
Ковалентен полупречник
141 pm
Електронегативност
1,31 (Полингова скала)
Ionization Potential
7,6462 eV
Atomic Volume
13,97 cm3/mol
Thermal Conductivity
1,56 W/cm·K
Oxidation States
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
Isotopes
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