beastboyy beastboyy
  • 21-06-2019
  • Chemistry
contestada

if a neutral atom of beryllium has 4 protons and 5 neutrons, what is the mass number of the atom?

Respuesta :

victorbakora victorbakora
  • 22-06-2019

Answer:

9

Explanation:

mass number =protons+neutrons

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