What does the mass number of an atom represent?

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Only the number of Protons.

The number of protons and neutrons.

The number of protons and electrons.

Only the number of neutrons.

answer is B.

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Detailed Solution

The mass number reveals the total amount of nucleons, or protons and neutrons, in the atom's nucleus. The quantity of protons in an atom's nucleus is known as its atomic number. Z is used to represent it traditionally.

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