The sum of protons and neutrons present in the nucleus of an a atom______
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Answer:
mass number
Explanation:
The mass number of an isotope is given by the sum of the total number of protons and neutrons in it. The atomic number describes the total number of protons in the nucleus. Therefore, the number of neutrons can be determined by subtracting the atomic number from the mass number.
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the sum of protons and neutrons present in the nucleus of an a atom is called as mass number.
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