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17-02-2022
Chemistry

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

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SpiritInly SpiritInly

17-02-2022

Answer:

20 neutrons

Explanation:

neutrons = mass number - atomic number

mass number = 39, atomic number = 19

neutrons = 39 - 19 = 20

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