gvasquez194 gvasquez194
  • 25-09-2020
  • Chemistry
contestada

What’s the mass number for this atom

Whats the mass number for this atom class=

Respuesta :

Space
Space Space
  • 25-09-2020

Answer:

169

Explanation:

Mass number is the number of protons and the number of neutrons combined.

70 + 99 = 169

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