haleyhannon12 haleyhannon12
  • 11-06-2022
  • Chemistry
contestada

An atom of potassium has 19 protons and 20 neutrons. What is its mass number? Select one:
a. 20
b. 39
c. 19
d. 10

Respuesta :

bridub22
bridub22 bridub22
  • 11-06-2022
B. 39 ! Add the protons to the neutrons because they are the ones with mass in an atom.
Answer Link
lzeito784 lzeito784
  • 11-06-2022
b. 39 add the protons and the neutrons
Answer Link

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