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How you can determine the number of neutrons an atom has from an atom's mass number and its atomic number?
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How you can determine the number of neutrons an atom has from an atom's mass number and its atomic number?

User Cslotty
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neutrons have the same mass as protons
so the number of neutrons = mass number - atomic number
or for simplicity you can remember it as n=(n+p)-p
User Tanisa
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