katie9902 katie9902
  • 19-01-2020
  • Chemistry
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How is the mass number of an atom determined

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lucasponchot
lucasponchot lucasponchot
  • 19-01-2020

Answer:

the number of protons and the number of neutrons determine an element's mass number. Since an element's isotopes have slightly different mass numbers, the atomic mass is calculated by obtaining the mean of the mass numbers for its isotopes.

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