Question

ᴡʜᴀᴛ ɪs ᴄᴀʟᴄɪᴜᴍ??????
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Answer 1

Answer:

Chemistry is a subject that involves the study of acids, bases, salts, carbon compounds, metals and non-metals. You have to remember the properties of various elements and also study how various compounds are formed.

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Explanation:

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Answer 2

Explanation:

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.