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Answer:
-The mass number or mass number (symbol: A), also called the atomic mass number, atomic mass number, or nucleon number (mass number, atomic mass number or nucleon number) is the total number of protons and neutrons (which when put together are called as nucleons) that are inside an atomic nucleus (atomic nucleus). Since protons and neutrons are both baryons, the mass number A is similar to the baryon number B such that the nucleus is that of the whole atom or ion. The mass number is different for each different isotope of a chemical element. It is not the same as the atomic number (atomic number) (Z) which indicates the number of protons of a nucleus, thus uniquely identifying an element. Consequently, the difference between the mass number and the atomic number (atomic number) gives the number of neutrons (N) according to the given nucleus: N = A − Z. [1]
Explanation:
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