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Element Description

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.

Property Name Property Value Property Name Property Value
Atomic Code (12Mg24.3050) First Ionization Energy 176K-cal/g-mole
CAS # 7439-95-4 Electronegativity 1.2Pauling's
Covalent Radius 1.36Angstroms
Melting Point 650°C Mohs Hardness @ 20°C 2.0
Boiling Point 1100°C Linear Coefficient of Expansion 26.1x10-6K-1
Density 1.738g/cm3 Electrical Resistivity 4.46µΩ-cm
Themal Conductivity 0.37cal/cm2/cm/s/°C Crystal Structure Hexagonal
Specific Heat 0.245cal/g°C Modulus of Elasticity 4570kg/mm2
Latent Heat of Fusion 88cal/g Thermal Neutron Cross Section 0.059barns/atom
Latent Heat of Vaporization 1260cal/g Poisson Ratio 0.35
Atomic Volume 14.0W/D Tensile Strength 33,000psi

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