Question

Give definition of the following.4) mass number​

Answer 1

Explanation:

Mass number, in nuclear physics, the sum of thenumbers of protons and neutrons present in the nucleus of an atom.

Answer 2

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Give definition of the following -

❥ Mass number

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$\sf \blue{Mass \: number \: }$

It is the sum of the number of neutrons and the number of protons. For example, the atomic number of Lithium is 4 which is equal to the number of protons, the number of neutrons of magnesium is 4. The mass number is equal to 8(4+4).