Question

how many protons neutrons and electrons does potassium have

Answer 1

hey dear your answer
Atomic Mass39.0983 atomic mass units
Number of Protons19
Number of Neutrons20
Number of Electrons19

Answer 2

To calculate he number of neutrons are in a single potassium atom, the number under the word potassium must first be rounded. (Note; that number is called the atomic weight) Since the number in the tenths place is no bigger than 5, the number rounds down to a 39. We can take atomic number (19) and subtract it from the rounded atomic weight (39). That leaves us with 20 which is the number of neutrons a typical potassium atom will have.

To summarize:

Calculate number of protons and electrons by looking at the atomic number.

Number of protons/electrons: 19

Calculate the number of neutrons by rounding the atomic weight and subtracting the atomic number from it

39 - 19 = 20

Number of neutrons: 20

Remember these values only apply for a single stable potassium atom
I hope it will help u