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How is the mass number calculated for an element
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How is the mass number calculated for an element

User Unfulvio
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2 Answers

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Mass number=Atomic number+ number of neutrons. Hope it helps
User Mkkekkonen
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6 votes
Find the number of protons and neutrons of that element and add them together. You might need periodic table. Hope it helps.
User Baron Legendre
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