Question

Which one of the following is not isoelectronic and isostructural with the rest of the group?

a) N₃^-          b) O₃​        c) N₂O       d) NO₂⁺

Answer 1

isoelectronic --> SAME amount of electrons; examples:

He = 2

Li = 3

Be = 4

if we had ions:

He = 2

Li+ = 3-1 = 2

Be+2 = 4-2 = 2

those will be isoelectronic

for...

isostructural...

they are essentially structures with the same structure regarding to each other.

SO:

a) N₃^-          b) O₃​        c) N₂O       d) NO₂⁺

a) N3 --> 7*3 = 21 electrons, but -1 charged so 22 electrons

b) O3 --> 8*3 = 24 electrons

c) N2+O --> 2*7 + 8 = 22 electrons

d) N+ O2+ --> 7 + 2*8 = 23 electrons, +1 charge = 22 electrons

therefore

all have 22 electrons but O3