Here's the breakdown of protons, electrons, and neutrons in potassium:

* Protons: 19

* Electrons: 19

* Neutrons: 20

Here's why:

* Atomic Number: Potassium's atomic number is 19. This number represents the number of protons in the nucleus of a potassium atom.

* Neutrons: The number of neutrons can vary, creating different isotopes. The most common isotope of potassium has a mass number of 39. To find the number of neutrons, subtract the atomic number (19) from the mass number (39): 39 - 19 = 20 neutrons.

* Electrons: Atoms are electrically neutral. Since potassium has 19 protons (positive charge), it also has 19 electrons (negative charge) to balance it out.