Seudónimo Seudónimo
  • 09-10-2016
  • Physics
contestada

what is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons

Respuesta :

SJ2006
SJ2006 SJ2006
  • 09-10-2016

Mass number = no. of protons + no. of neutrons

 so, it would be, 3+4 = 7

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