Nitrogen has a valence of 3 and an oxidation state of -3 in the compound.

Nitrogen has compounds with a valence value of 3.
Let’s compose the formulas:
N2O3 – nitric oxide;
HNO2 – nitrous acid;
NaNO2 – sodium nitrite;
NF3 – nitrogen fluoride.
Nitrogen compound with oxidation state – 3
NH3 ammonia;
NH4OH – ammonium hydroxide;
Li3N is lithium nitride.
Nitrogen compounds with valence – 3 exhibit oxidizing properties. Let’s give an example:
N2O3 + H2O = HNO2
Nitric oxide in aqueous solution forms nitrous acid.
Nitrogen chemicals with an oxidation state of 3 are reducing agents, for example:
NH3 + HOH = NH4OH
Ammonia in aqueous solution forms ammonium hydroxide.