(Magnesia, section in Thessaly) Isolated by Davy in 1808 and prepared by Bussy in 1831. Eighth most abundant element in the earth's crust, but not found in it's elemental form. Found in large deposits as magnesite, dolomite and magnesium chloride.
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alkaline-earth metal,light, silvery-white, tarnishes in air, ignites upon heating and emits a bright flame.
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flashlight photography, flares, fire works,missile and airplane metal alloying,addition to aluminum as an alloy,MgOH is milk of magnesia-used is medicines,important in plant and animal life, used in computers for radio-frequency shielding