Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Nucleus

The mass number of a nucleus is equivalent to

Options

Athe number of protons inside the nucleus
Bthe number of nucleons inside the nucleus
Cthe mass of the nucleus in atomic mass units
Dthe number of neutrons inside the nucleus

Correct answer

B. the number of nucleons inside the nucleus

Step-by-step solution

The mass number of a nucleus is defined as the sum of the number of protons and the number of neutrons present in it. Protons and neutrons are collectively referred to as nucleons. Thus, the mass number is equal to the total number of nucleons inside the nucleus.

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