Why does NO2 dimerise?

Concept Videos :-

#2 | 15th Group: Properties: II
#3 | 15th Group: Ammonia

Concept Questions :-

group 15 ,preparation and properties

NO2 contains 7+2×8 i.e., 23 odd electrons. In the valence shell N has seven electrons and hence less stable. To acquire stability it dimerizes to form N2O4

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