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Magnesium (₁₂Mg^24.3050)
[7439-95-4]

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Elemental Form


Magnesium, the eight most abundant element in the earth's crust, is a light, moderately hard, silvery-white metal. While ingots of the metal tarnish in air and react very slowly with water, finely divided powder is very reactive. Magnesium does not occur uncombined, but is found commonly in magnesite, dolomite, and other minerals. It is one of the lightest of the structural metals (a third lighter than aluminum), making it essential as an alloy in airplane and missile construction.
Melting Point	650°C	Boiling Point	1100°C
Density	1.738g/cm³	Themal Conductivity	0.37cal/cm²/cm/s/°C
Specific Heat	0.245cal/g°C	Latent Heat of Fusion	88cal/g
Latent Heat of Vaporization	1260cal/g	Atomic Volume	14.0W/D
First Ionization Energy	176K-cal/g-mole	Electronegativity	1.2Pauling's
Covalent Radius	1.36Angstroms	Mohs Hardness @ 20°C	2.0
Linear Coefficient of Expansion	26.1x10^-6K^-1	Electrical Resistivity	4.46µΩ-cm
Crystal Structure	Hexagonal	Modulus of Elasticity	4570kg/mm²
Thermal Neutron Cross Section	0.059barns/atom	Poisson Ratio	0.35
Tensile Strength	33,000psi