Chemistry, asked by arsh3940, 1 year ago

What defines the mass number of an isotope?

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Answered by ashish17817
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The mass number (symbol A, from the German word Atomgewicht (atomic weight), also called atomic mass number or nucleon number, is the totalnumber of protons and neutrons (together known as nucleons) in anatomic nucleus. The mass numberis different for each different isotopeof a chemical element.
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