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  • 13-08-2021
  • Chemistry
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HELP! How is the mass number of an atom calculated?
A - total number of electrons

B - total number of protons

C - protons plus neutrons

D - electrons plus neutrons

Respuesta :

szdneiigzq szdneiigzq
  • 13-08-2021
The answer is C. Mass number = protons + neutrons
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