I have two doubts in my course regarding resonance and aromaticity.... (1) In various resonating structures, the hybridization of an atom may vary. Eg:- in aniline's nitrogen atom, it is sp3 as well as sp2 in different resonating structures. Since the actual molecule is a weighted mean of all the resonating structures, the hybridization of the nitrogen atom must be somewhere between sp2 and sp3 that is, the hybrid orbitals have sp3 as well as sp2 character. Now, I want to know if the molecule is planar or not. If the hybridization of the nitrogen atom was purely sp3, the molecule would be non-planar and if it was purely sp2. So how do I decide it's planarity? (2) When we check for aromaticity, the molecule must be planar. However, is this 'planar' condition only for the atoms involved in the delocalization of electrons, or for all atoms?