How can I determine if and when a molecule has or needs a resonance structure?
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Solution
Resonance Structure:
A particle can have resonance structures when it has a lone pair or a double bond on the atom close to a double bond.
At the point when you can draw at least two Lewis structures for a particle, varying just in the locations of the electrons, the actual structure is none except is a resonance hybrid of them all.
Lewis structure of Nitrite :
The central atom must be the least electronegative atom.
Draw a skeleton structure in which other atoms are single-bonded to the central molecule:
Here the number of valence electrons is 18 in
Draw a structure with electron pairs in which every atom should have an octet rule.
The number of valence electrons in are 20.
The number of valence electrons present in are more when compared to
Draw another structure, this time adding one double bond for every additional set of electrons: and (two prospects)
Right here, the two prospects let us know that we will have two resonance structures.