What is the oxidation number of phosphorus in P2O3?
O mostly always has a -2 charge, three O's = -6. The two P atoms must balance that charge with +6 since P2O3 overall has no charge. If 2 P = +6, then 1 P = +3.
is that right ?
2 answers
Yes, that's right. The oxidation number of P in P2O3 is +3.
thank you !!