Question #2cb8f

1 Answer
anor277
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.

Explanation:

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.

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