Here's why:

* Electrons and Charge: Atoms have a neutral charge because they contain an equal number of protons (positive charge) and electrons (negative charge).

* Valence Electrons: Potassium has one valence electron in its outermost shell.

* Tendency to Lose: Potassium readily loses this valence electron to achieve a stable electron configuration, which is similar to the noble gas Argon.

* Cation Formation: When potassium loses an electron, it becomes a positively charged ion called a cation, with a charge of +1.

Therefore, potassium typically exists as a +1 ion.