Answer
In 1807, Humphry Davy, a prominent British chemist, achieved a scientific breakthrough by successfully isolating potassium. Through a series of meticulous experiments involving electrolysis, Davy managed to extract potassium from potash, a compound commonly known as potassium hydroxide. His discovery marked a significant milestone in the field of chemistry, paving the way for further advancements in the understanding and application of alkali metals.