Question

What is calcium ??

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Answer 1

Answer:

Calcium is a chemical element with the symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium

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Answer 2

Answer:

Calcium is one of the mineral . It comes under Alkaline-earth metals group . It can be denoted as (Ca). It's melting point is 842°c and its boiling point is 1484°c . It's atomic weight is 40.078 and its atomic number is 20 . It is also very useful nutrient for our bones and body . It is available only in milk products .

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