Bromide ions are negatively charged ions formed when bromine, a halogen element, gains an electron. They are represented by the chemical symbol Br-. Bromide ions are commonly found in nature, particularly in seawater and certain minerals, and play a role in various biological processes. In chemistry, bromide ions are often used in reactions and can act as reducing agents. They are also important in the production of certain compounds, such as brominated flame retardants and medications. Due to their properties, bromide ions are utilized in various industrial applications and research settings.