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ChemistryCLASS 11CBSE

answered 18 May 2026

If an atom has 10 protons and 12 neutrons, what is its mass number?

A.VERIFIED ANSWERfact-checked by tutors

The mass number is 22.

The mass number is the sum of protons and neutrons. In this case, 10 protons + 12 neutrons = 22.

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