4.3: Oxidation Numbers and Redox Reactions - Chemistry …
https://chem.libretexts.org/Courses/Northern_Michigan_University/CH_215%3A_Chemistry_of_the_Elements_Fall_2023/04%3A_Reactivity-_Redox_Chemistry/4.03%3A_Oxidation_Numbers_and_Redox_Reactions
WEBSep 28, 2023 · In the reaction above, the nitrogen in the NO 3– ion is assigned an oxidation number of +5, and each oxygen is assigned an oxidation number of –2. This assignment corresponds to the nitrogen having lost five valence electrons to the more electronegative oxygen atoms.
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