Question

question =what is calcium ?
please help me​

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.

Explanation:

Our bones are made up of calcium.

Answer 2

Calcium

It is a chemical element which is found in foods such as milk and cheese.It helps to make bones and teeth strong.

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