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Yesterday, 14:58

What is the mass number of an isotope

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Answers (2)
  1. Yesterday, 15:28
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    The number of nucleons in the nucleus is the atom's mass number, that being said, each isotope of a given element has a different mass number. so there isn't one single mass number for an isotope.
  2. Yesterday, 18:54
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    The mass number given on the periodic table is a weighted average of all the isotopes. You get the exact mass of an isotope by adding the protons (atomic number) to the number of neutrons in that isotope.
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