KnowraHydrogen iodideLinked fromLinked fromThe 3 pages that link to Hydrogen iodide, each with the reason it gives.All 3Broader topic 1Compared with 2Hydrogen chlorideCompared with: Comparing this hydrogen halide shows how bond strength changes down the group.Hydrogen bromideCompared with: Comparing HI with HBr shows how hydrogen-halide properties vary down the halogen group.