How many neutrons are in the nucleus of a potassium atom with a mass number of 39?.

asked Mar 28, 2023 80.5k views

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8 votes

Answer:

20 neutrons

Step-by-step explanation:

neutrons = mass number - atomic number

mass number = 39, atomic number = 19

neutrons = 39 - 19 = 20

Huw answered Apr 1, 2023

by Huw

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