Potassium ion, represented as K+, is a positively charged ion formed when a potassium atom loses one electron. It is essential for various biological processes, including nerve function and muscle contraction. Potassium is a vital mineral found in many foods, such as bananas and potatoes, and plays a crucial role in maintaining fluid balance in the body. In addition to its biological importance, potassium ions are also significant in chemistry and industry. They are commonly used in fertilizers to promote plant growth and are involved in various chemical reactions. The presence of potassium ions in solutions can affect their conductivity and reactivity.