Sodium ions are positively charged particles formed when sodium atoms lose one electron. This process is essential for various biological functions, including nerve impulse transmission and muscle contraction. Sodium ions are abundant in nature and play a crucial role in maintaining fluid balance in the body. In the environment, sodium ions are commonly found in salt (sodium chloride) and seawater. They are vital for many chemical reactions and are used in various industrial applications, such as in the production of glass and soap. Understanding sodium ions is important in fields like chemistry, biology, and environmental science.