DashytheArianator
DashytheArianator DashytheArianator
  • 19-03-2017
  • Physics
contestada

what is the mass number of an isotope of this atom that has 2 neutrons

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osprey2015
osprey2015 osprey2015
  • 19-03-2017
Helium. 2 protons and 2 neutrons
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