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A silvery white metal which is obtained by the electrolysis of molten calcium chloride. One of the most abundant metal elements on Earth, but it never occurs as the pure element.
The main deposits are limestone (CaCO3 ), Dolomite (CaCO3 .MgCO3 ) and Gypsum (CaSO4 .2H2O).
There is 1kg of calcium in every person.
Usually formed by fusing lime and hard coal in a furnace.
Trade name: Carbide
Chemical formula: CaC2
Trade name: Chalk, Limestone.
Chemical formula: CaCO3
Absorbs moisture from the atmosphere and is used for drying gases.
Chemical formula: CaCl2
Trade name: Slaked lime
Chemical formula: Ca(OH)2
Trade name: Bleaching powder
Chemical formula: CaCl(OCl)
Trade name: Quicklime
Chemical formula: CaO
Used to make plaster of paris and plaster.
Trade name: Gysum
Chemical formula: CaSO42H2O
See also: Chemical Table.