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Mars2501 [29]
2 years ago
8

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

Chemistry
2 answers:
lord [1]2 years ago
8 0

Answer:

20 neutrons

Explanation:

neutrons = mass number - atomic number

mass number = 39, atomic number = 19

neutrons = 39 - 19 = 20

Bas_tet [7]2 years ago
5 0

Answer:

Answer is 20.

Explanation:

Hope I Helped!!

:)

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Explanation:

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How do I solve this?
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The heat contained is 1236 Joules

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