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Physical characteristics

Magnesium in Metallurgy
What is magnesium?
Physical characteristics
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  • magnesium notable features
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Magnesium alloys
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Metallurgy and engineering
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FAQ

12

sodium ← magnesium → aluminium

Be

Mg

Ca


Periodic Table - Extended Periodic Table

General

Name, Symbol, Number

magnesium, Mg, 12

Chemical series

alkaline earth metals

Group, Period, Block

2, 3, s

Appearance

silvery white
magnesium-physical-caharcteristics

Atomic mass

24.3050(6) g·mol-1

Electron configuration

[Ne] 3s2

Electrons per shell

2, 8, 2

Physical properties

Phase

solid

Melting point

923K
(650°C, 1202°F)

Boiling point

1363K
(1090°C, 1994°F)

Heat of fusion

8.48 kJ·mol-1

Heat of vaporization

128 kJ·mol-1

Heat capacity

(25°C) 24.869 J·mol-1·K-1


Source Magnesium.com
          en.wikipedia.org

Vapor pressure

P(Pa)

1

10

100

1 k

10 k

100 k

at T(K)

701

773

861

971

1132

1361

Atomic properties

Crystal structure

hexagonal

Oxidation states

2
(strongly basic oxide)

Electronegativity

1.31 (Pauling scale)

Ionization energies
(more)

1st: 737.7 kJ·mol-1

2nd: 1450.7 kJ·mol-1

3rd: 7732.7 kJ·mol-1

Atomic radius

150 pm

Atomic radius (calc.)

145 pm

Miscellaneous

Magnetic ordering

paramagnetic

Electrical resistivity

(20°C) 43.9 n Ω·m

Thermal conductivity

(300K) 156 W·m-1·K-1

Thermal expansion

(25°C) 24.8 µm·m-1·K-1

Speed of sound (thin rod)

(r.t.) (annealed)
4940 m·s-1

Young's modulus

45 GPa

Shear modulus

17 GPa

Bulk modulus

45 GPa

Poisson ratio

0.29

CAS registry number

7439-95-4

What is magnesium?

Green vegetables such as spinach provide magnesium because the center of the chlorophyll molecule contains magnesium. Nuts (especially cashews and almonds), seeds, and some whole grains are also good sources of magnesium.

more about magnesium
Notable features

Magnesium is a fairly strong, silvery-white, light-weight metal. It is protected by a thin layer of oxide which is fairly impermeable and hard to remove. Magnesium reacts with water at room temperature, though it reacts much more slowly (for example) than calcium.

more about magnesium features

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