KOH is potassium hydroxide. It's not a polyatomic ion, but an ionic compound made up of a metal cation (potassium, K+) and a polyatomic anion (hydroxide, OH-).

Here's how to break it down:

* Potassium (K+) is a simple monatomic ion with a +1 charge.

* Hydroxide (OH-) is a polyatomic ion made of one oxygen atom and one hydrogen atom with a -1 charge.

To form a neutral compound, one potassium ion combines with one hydroxide ion.