Give one word answer for the following:
The total number of protons and neutrons present in the nucleus of an atom.

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Solution

Mass number(A)- The number of protons and neutrons combine to give us the mass number of an atom.
Proton- A proton is a positively charged subatomic particle present in the nucleus of an atom.
Neutron- A neutron is a neutral subatomic particle present in the nucleus of an atom.
Hence, The total number of protons and neutrons present in the nucleus of an atom is its mass number.

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