Science, Tech, Math › Science Halide Ion Definition in Chemistry Share Flipboard Email Print Stocktrek / Getty Images Science Chemistry Chemical Laws Basics Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated August 11, 2018 What is a halide ion? The name halide comes from the element halogen. A halide ion is a singlet halogen atom, which is an anion with a charge of -1. Examples F-, Cl-, Br-, I- Cite this Article Format mla apa chicago Your Citation Helmenstine, Anne Marie, Ph.D. "Halide Ion Definition in Chemistry." ThoughtCo, Aug. 27, 2020, thoughtco.com/definition-of-halide-ion-in-chemistry-604524. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Halide Ion Definition in Chemistry. Retrieved from https://www.thoughtco.com/definition-of-halide-ion-in-chemistry-604524 Helmenstine, Anne Marie, Ph.D. "Halide Ion Definition in Chemistry." ThoughtCo. https://www.thoughtco.com/definition-of-halide-ion-in-chemistry-604524 (accessed April 11, 2021). copy citation