Couldn't decide where to post... Chemistry or quantum mechanics... But posted here cause I wanted to know a physicist's view... We know that the electrons in the atom have discrete energy,I mean not just any energy... An electron can't have the energy between 2s and 2p orbitals... But after hybridization i.e. sp hybridization the electron will have energy which is the average of s and p orbitals... How? Is this 'legal' to have energy between the orbitals we know?