• Definition for "mass number"
    • the sum of the how many neutrons and…
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  • Hypernym for "mass number"
  • Etymologically Related for "mass number"

mass number definition

  • noun:
    • the sum of the how many neutrons and protons in an atomic nucleus. Also called nucleon number.
    • The total number of protons and neutrons in an atomic nucleus.
    • the sum the number of neutrons and protons in an atomic nucleus
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