Question
12. Fill in the blanks to the following rules for assigning oxidation number. Write your answer on the line provided. 1.Atoms in their free state have an oxidation number of (A) (+6) \mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-}(-2)[+6(2)+(-2(7))=-2 Oxygen is assigned an oxidation number of, (c)EXCEPT when it is in a per
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