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Atomic symbol - Ca
Atomic weight - 40.078
Atomic number - 20
Electron configuration - 2-8-8-2
Oxidation states - +2
State of matter - solid
Light metal
Discovered in 1808 by Sir Humphry Davy
Boils at 1484 .C, melts at 839 .C

Calcium is just behind aluminum and iron in the list of abundant metals, and
makes up 3% of the Earth's crust. Calcium Carbonate can be found as limestone,
marble, chalk seashells, and calcite. It is found as dolomite when combined
with magnesium. Calcium is a good reducing agent and forms heavy hydroxide
coats with contact with moist air.

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