kevlazo789 kevlazo789
  • 04-09-2017
  • Chemistry
contestada

An atom of potassium has 19 protons and 20 neutrons. what is its mass number?

Respuesta :

Tefnut09
Tefnut09 Tefnut09
  • 29-09-2021

Answer:

39

Explanation:

Mass number = Number of protons + number of neutrons

Therefore,

19 + 20 = 39

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