Potassium’s atomic number is 19, and its atomic mass is approximately 39. How many neutrons does potassium have?(1 point)

Question

Responses

58

20

19

39

Answer 1

To find the number of neutrons, subtract the atomic number from the atomic mass of an element. In this case, the atomic number of potassium is 19 and the atomic mass is approximately 39. Therefore, the number of neutrons in potassium is approximately 39 - 19 = 20.

So, the correct answer is 20.