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A Lewis structure can be defined as the basic structure of a molecule which used valence electron of each atom involved. In Lewis鈥檚 structure, the least electronegative atom will be the central atom.

N belongs to group 15 having 5 electrons in the valence that requires give or take 3 electrons to fulfil its octet, In Lewis鈥檚 structure, the N-atom needs 3 electrons which will be provided by the other 2 N-atom. Both N-atom provides 2 electrons to the one N-atom and there is the movement of electrons from one N-atom to another N-atom. There is a movement of positive charge over N-atom and there is a positive charge over N-atom to fulfil its octet.

N belongs to group 15 having 5 electrons in the valence required to give or take 3 electrons to fulfil its octet, O-atom belongs to group 16 having 6 electrons in the valence shell and requires 2 electrons to fulfil the octet. In Lewis鈥檚 structure, the N-atom needs 3 electrons which will be provided by the 2 O-atom. The O-atom is more electronegative than N-atom and becomes negatively and positively charged respectively. There is the movement of electrons from one O-atom to another O-atom. The N-atom acquire a positive charge and there is the movement of the negative electron over the electronegative O-atom.