Iodide
Iodide is the monatomic anion I⁻, formed when an iodine atom gains one electron. The name also applies to compounds containing this ion.
Iodine: Iodine is the chemical element with atomic number 53, a halogen that forms iodide by gaining one electron. Iodide is iodine in its negatively charged, one-electron-gained state.
Iodized salt: Iodized salt is table salt fortified with small amounts of iodine compounds to prevent iodine deficiency. Potassium iodide is one compound used to supply dietary iodine.
Anion: An anion is an ion with a net negative electric charge. Iodide is the singly charged negative ion of iodine.
Iodate: Iodate is the polyatomic anion IO₃⁻, in which iodine is bonded to three oxygen atoms. Unlike iodide, iodate contains oxygen and iodine in a higher oxidation state.
Ionic bond: An ionic bond is the electrostatic attraction between oppositely charged ions. Ionic attraction holds iodide in salts with positively charged ions.
Thyroid hormone: Thyroid hormones are iodine-containing hormones that regulate metabolism, growth, and development. The thyroid takes up iodide as raw material for hormone synthesis.
Halogen: A halogen is an element in group 17 of the periodic table. Iodine belongs to the halogens, whose atoms commonly gain one electron.
Bromide: Bromide is the anion Br⁻, formed when bromine gains one electron. It shares iodide's charge and halide chemistry but contains the lighter element bromine.
Solvation: Solvation is the surrounding of dissolved particles by solvent molecules. Water molecules stabilize separated iodide ions in aqueous solution.
Potassium iodide: Potassium iodide is the ionic compound KI, widely used as a source of iodide. It is a common, water-soluble iodide salt used in medicine and laboratories.