Calcium is a chemical element in the periodic table that has the symbol Ca and atomic number 20.
Calcium is a soft grey alkaline earth metal that is used as a reducing agent in the extraction of thorium, zirconium and uranium.
Calcium is also the fifth most abundant element in the earth's crust.
It is essential for living organisms, particularly in cell physiology, and is the most common metal in many animals.
For more information about the topic Calcium, read the full article at Wikipedia.org, or see the following related articles:
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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