Question

what is oxidation number ? explain​

Answer 1

Answer:

An oxidation number is a number that is assigned to an atom in a substance. The oxidation number could be positive, negative, or zero, and it indicates if electrons are lost or gained. ... Calcium has a +2 charge, which means it lost two electrons. Oxygen has a -2 charge, which means it gained two electrons.

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Answer 2

Answer:

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An oxidation number is a number that is assigned to an atom in a substance. The oxidation number could be positive, negative, or zero, and it indicates if electrons are lost or gained. ... Calcium has a +2 charge, which means it lost two electrons. Oxygen has a -2 charge, which means it gained two electrons

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