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Who Discovered Calcium?
The element Calcium was first discovered by Sir Humphry Davy, a British Chemist, in 1808, in England, through the electrolysis of a mixture of lime (CaO) and mercuric oxide (HgO).
Calcium is a chemical element with atomic number 20 and its symbol is Ca. Calcium is an alkaline earth metal soft, gray, used as a reducing agent in mining extraction of thorium, uranium and zirconium.
Calcium is not found in nature as a free element but as part of several minerals.
It is the fifth item in order of abundance in the earth's crust, and is essential for life on earth.
source:
lhttp://education.jlab.org/itselemental/ele020.html
http://www.webelements.com/calcium/
http://www.bbc.co.uk/history/historic_figures/davy_humphrey.shtml