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# On rare occasions, oxidation numbers do not have to be whole numbers. Determine the oxidation number for I in I3–?

A.) -3/2

B.) -1/3

C.) -2/2

D.) -2/3

### 1 Answer

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- oeman50Lv 73 weeks ago
B. Since each of the 3 iodines contribute to the -1 oxidation number, they each have to be 1/3.

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