Answer:
(a) [tex]NO_{2}^{-}[/tex] ion has two resonance structures.
(b) [tex]O_{3}[/tex] molecule is isoelectronic.
(c) Due to resonance N-O bond is having double bond character.
Explanation:
(a)
The Lewis structure of [tex]NO_{2}^{-}[/tex] is as follows.
(In attachment)
(b)
Isoelectronic means both species having same number of electrons .
[tex]NO_{2}^{-}[/tex] is isoelectronic with [tex]O_{3}[/tex] .
Both these molecules having 24 electrons and 18 valence electrons.
Hence, [tex]O_{3}[/tex] molecule isoelectronic with [tex]NO_{2}^{-}[/tex].
(c)
The bond length of N-O single bond is more than the N-O double bond.
Due to the resonance structure of [tex]NO_{2}^{-}[/tex] N-O bond has double bond character.
