Question

The total number of protons and neutrons in an atom is called the
mass number. This is represented by the letter 'A'.​

Answer 1

Explanation:

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Answer 2

The number of protons and neutrons combined to give us the mass number of an atom. It is represented using the letter 'A.' As both protons and neutrons are present in the nucleus of an atom, they are together called nucleons. For example, an atom of carbon has 6 protons and 6 neutrons.

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