In NaNO3 sodium nitrate , the oxidation state of sodium Na is +1, and the oxidation state of oxygen O is -2. To determine the oxidation state of nitrogen N , we can use the formula:Overall charge = oxidation state of Na + oxidation state of N + 3 * oxidation state of O Since sodium nitrate is a neutral compound, the overall charge is 0. Therefore:0 = +1 + oxidation state of N + 3 * -2 0 = 1 + oxidation state of N - 65 = oxidation state of NSo, the oxidation state of nitrogen in NaNO3 is +5.