How many neutrons make up one of these potassium atoms? 19 20 38 58

asked Aug 4, 2018 219k views

3 votes

How many neutrons make up one of these potassium atoms?

19
20
38
58

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1 vote

b 20
( i took the test)

Frank Wiles answered Aug 5, 2018

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4 votes

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

Sahir answered Aug 10, 2018

by Sahir

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