Halide ions

Halide ions are negatively charged atoms formed when halogen elements—fluorine, chlorine, bromine, iodine, and astatine—gain an electron. These ions are common in nature and play crucial roles in various chemical processes, including disinfectants and the atmosphere. For example, chloride ions (Cl⁻) are abundant in salt. They are essential for maintaining fluid balance and nerve function in living organisms. Halide ions are typically found dissolved in water, and their behavior influences many biological, environmental, and industrial systems.