please help and and There are x valence electrons in the NO2-1 ion and the bond

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please help

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There are x valence electrons in the NO2-1 ion and the bond order is y. x = 17 and y = 3 x = 18 and y = 2.5 x = 17 and y = 2 x = 17 and y = 1.5 x = 12 and y = 3 x = 18 and y = 1.5 How many valid Lewis structures did you obtain for the nitrate anion NO3-1? 1 2 3 4 An N-0 bond order of 4/3 is calculated for NO3-1. Does this match your Lewis Structure? Explain. Yes, The sum of the bond orders divided by the number of resonance structures is equal to the calculated bond order. No, there is no correlation.

Explanation / Answer

valence e- s of N = 5

valence e- s of O = 2x6 = 12

one electron for -ve charge = 1

total = 18

bond order = no.of bonds around central atom / no.of atoms linked

                     = 3/2 = 1.5

x = 18 , y = 1.5

3 lewise structures are possible for NO3-

yes, the sum of the bond orders divided by the number of resonance structures is equal to the calculated bond order.

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