joscrist3 joscrist3

13-04-2017
Physics

contestada

How many neutrons make up one of these potassium atoms?

19
20
38
58

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Аноним Аноним

13-04-2017

b 20
( i took the test)

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yoloswaggs51 yoloswaggs51

13-04-2017

To find the number of neutrons you take the atomic mass, 39, and subtract the number of protons, 19.
so 39-19=20
potassium has 20 neutrons

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