Question #2cb8f

1 Answer
Dec 23, 2015

Consider the size of the hydrogen bound atom: oxygen/nitrogen versus chlorine versus iodine. Because iodine is largest, there should be least overlap with the small hydrogen atom.


Thermodynamically, the #H-X# bond in hydrogen iodide is the weakest bond. There is better overlap between hydrogen and the smaller atoms, and, therefore, the hydrogen element bonds resist reduction.