Fe2+, or ferrous ion, is a positively charged ion of iron with a charge of +2. It is formed when iron loses two electrons, making it an important species in various chemical reactions. Fe2+ is commonly found in minerals and plays a crucial role in biological systems, particularly in oxygen transport in blood through hemoglobin. In aqueous solutions, Fe2+ can react with other ions and compounds, influencing the chemistry of the environment. It is also significant in industrial processes, such as the production of steel, where it contributes to the material's strength and durability.