Name :  Calcium
Symbol :  Ca
Atomic Number :  20
Atomic Weight :  40.078
Specific Heat :  0.63 J/gK
Melting Point :  839°C
Vaporization :  153.60 kJ/mol
Boiling Point :  1484°C
Electronegativity :  1
Density@293 K :  1.55 g/cm³
Discovered :  Sir Humphrey Davy, England, 1808
Description :  Fairly hard, silvery-white metal. Fifth most abundant element in the earth\'s crust (41,500 ppm). Occurs only in compounds.
Uses :  Used by many forms of life to make shells and bones. Virtually no use for the pure metal, however two of its compounds are, lime (CaO) and gypsum (CaSO4), are in great demand by a number of industries.