What is formula of potassium?

The chemical formula of potassium is K. Potassium is a chemical element with the atomic number 19 and is part of the alkali metal group. It is a soft, silvery-white metal that reacts violently with water and air. Potassium is an essential nutrient for plants, animals, and humans and is required for the proper functioning of the nervous system, muscles, and heart. It is commonly found in bananas, citrus fruits, potatoes, spinach, and milk. It is also used in the production of fertilizer, glass, and soap. The atomic mass of potassium is 39.1 and its symbol is derived from the Latin word Kalium.