Question

Oxidation state of n in nano3

Answer 1

he oxidation number of nitrogen in the nitrate ion is +5. 

I want to caution some people reading this that the +5 is not a charge. Nitrogen never has a positive ionic charge, and it barely has a negative charge (-3) in only a few compounds that are mildly ionic, like X3N, where X is an alkali metal (i.e K, Rb or Cs).

i hope it will help you 
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