⭕plz explain option 2 & 3 thanks!☺️
(2) The resonating structures of nitrate ion NO3- are:
Bond order of NO bond is = 4/3 = 1.33 (Total number of bonds/Resonating structures)
(3) Formal charge=+ or - [Number of valence electron on atom -(non-bonded electrons+number of bonding electrons/2)]
So, Here three O will have separate formal charges, because three of them are having different number of bonds and non-bonded electrons.
Formal charges of O
1st(with double bond), 6-[4+2/2]=-1 (-because O is non-metal gains the electron))
2nd(with -1 Charge), 7-[6+1/2]=-1/2
3rd, 6-[5+1/2]=-1/2
So, average formal charge of O would be= -2/3
Average formal charge would be
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