* Highly Reactive: Potassium is a highly reactive alkali metal. It reacts violently with water, oxygen, and even the moisture in air.
* Fire Hazard: This reactivity means that exposure to air can cause potassium to ignite spontaneously.
* Protection from Oxidation: The oil layer acts as a barrier, preventing potassium from reacting with air and oxidizing. Oxidation would form potassium oxide, which is a white powder and less reactive, but still a safety hazard.
* Prevention of Reactions: The oil prevents the potassium from reacting with other substances, like the container it's stored in.
In summary, storing potassium in oil helps to prevent it from reacting with the environment, making it safer to handle and store.