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

Notes:
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.