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Explain why only protons and neutrons are used to calculate mass number
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Explain why only protons and neutrons are used to calculate mass number

User Fasaxc
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The number of neutrons is variable, resulting in isotopes, which are different forms of the same atom that vary only in the number of neutrons they possess. Together, the number of protons and the number of neutrons determine an element's mass number.

User Bsr
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