Elements
12

Mg

Magnesium

Magnesium (Mg) is a silver coloured metal that has the atomic number 12 in the periodic table. It is an Alkaline Earth Metal and is located in Group 2 of the periodic table, it has the symbol Mg.

Magnesium is located in the Alkaline earth metals, Group 2. It is a shiny silver coloured metal but often has a dull appearance due to tarnishing by its reaction with Oxygen to form Magnesium oxide. Magnesium is commonly used in flares and fireworks due to the bright white flame produced upon its combustion. It also has common uses as an antacid in its compound of Magnesium hydroxide. Magnesium is also important in the growth of plants as its role in the central metal of chlorophyll, the site of photosynthesis. Magnesium was identified by Joseph Black in 1755 who identified it as an element but it was not until 1808 when Sir Humphrey Davy used electrolysis to separate Magnesium metal from Magnesium oxide. It is located in Group 2 as a metallic solid at room temperature it is relatively light weight and strong. It has a melting point of 650°c and a boiling point of 1091°c.

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FAQ's

What is the Melting Point for Magnesium?

Magnesium has a Melting Point of 650°F, meaning at 650°F it will turn to a liquid.

What is the Boiling Point for Magnesium?

Magnesium has a Boiling Point of 1090°F, meaning at 1090°F it will turn to a Gas.

What is the Electronegativity of Magnesium?

Magnesium's Electronegativty is 1.31. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Magnesium?

Magnesium has a Heat of Vaporization of 127.4 kJ/mol.

Uses

Used in alloys to make airplanes, missiles and other uses for light metals. Has structural properties similar to aluminium. But since it is flammable at temperatures of burning gasoline, its uses are limited.

Sources

Usually obtained by electrolysis of melted magnesium chloride (MgCl2) found in sea water. Each cubic mile of seawater contains about 12 billion pounds of magnesium.

12
Protons
12
Electrons
12
Neutrons

Mg

Element Symbol
Mg
Atomic Weight
24.305
Atomic Number
12
State
Solid
Melting Point
Unknown
650
°C
Boiling Point
1090
Unknown
°C
Heat of Vaporization
127.4
Unknown
kJ/mol
Crystal Structure
Hexagonal
Thermoconductivity
1.56
Unknown
W/cmK
Shells
2,8,2
Group
Alkali Earth Metal
Period
3
Block
S Block
Orbitals
[Ne] 3s2
Coefficient of Thermal Expansion
24.8 10^-6 K^-1
Covalent Radius
1.36 Å
Density at 293K
1.738 g/cm³
Electrical Conductivity
0.226 10^6/cm ohm
First Ionization Potential
7.6462 V
Second Ionization Potential
15.035 V
Third Ionization Potential
80.143 V
Ionic Radius
.72 (+2) Å
Oxydation States
2
Lattice Parameter
3.2095 Å
Lattice Parameter 2
--
Lattice Parameter 3
4.3765 Å
Pronounced

mag-NEE-zih-em

Discovered by

Sir Humphrey Davy

Discovery date

1808

Orbital configuration
2,8,2

Download the Periodic Table

Explore Other Alkali Earth Metals

137.327
56

Ba

Barium
87.62
38

Sr

Strontium
40.078
20

Ca

Calcium
226
88

Ra

Radium
9.012
4

Be

Beryllium
Alkaline earth metals is the second most reactive group of elements in the periodic table. They are found in group 2 of the periodic table (formally known as group IIA).
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