Explain : Atomic mass number. – InterviewSolution

1.

Explain : Atomic mass number.

Answer»

The sum of the total number of protons and neutrons present in the nucleus of an atom is called the atomic mass number of that atom.
Atomic mass number is represented by A
Mass number (A) = Number of protons (Z) + Number of neutrons (N) = Total number of nucleons

∴ A = Z + N OR N = A – Z

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