The hybrid orbital set used by the central atom in IO2- is .

Explanation:

is the Iodite ion. The ion has a total of 7+6(2)+1 = 20 electrons. The Iodite ion, or iodine dioxide anion, is the halite with the chemical formula IO−

2. Within the ion the Iodine exists in the oxidation state of +3. The hybridization state of central atom I in Iodite ion is .

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