What is the oxidation number of each atom in potassium nitrate, KNO3?

K = +1, N = +5, O = -2 Potassium nitrate is composed of two ions, K+ and NO3-. Since the net charge for NO3- is -1, N must be +5 to counterbalance the three O.
Updated on Thursday, February 02 2012 at 08:18AM EST
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