Jordanramirez51 Jordanramirez51

19-06-2018
Physics

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Potassium has a mass number of 40 and an atomic number of 19. How many protons does it have?

A.59
B.21
C.19
D.40

Respuesta :

19-06-2018

The answer is C.
Potassium-40 or any type of potassium always has an atomic number 19 and 19 protons.

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valeera valeera

19-06-2018

The answer is c. 19

The atomic number always represents number of protons

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