Question: What happens when Potassium is Exposed to Air?
Answer: Three compounds are formed during the reaction, they are potassium oxide, potassium peroxide, and potassium superoxide. Potassium is a very active metal that reacts violently with oxygen in the presence of air. Potassium oxidizes faster than most of the metals and forms oxides with oxygen-oxygen bonds.
8K + 4O2 → 2K2O+ 2KO2 + K2O2