Electronic configuration of O: 1s22s22p4
Valence orbital representation:
1. When 2s2 orbital hybridised with 2sx, 2py and 2pz form the following sp3 hybridisation structure.
2. In 2s2 and 2px2, the electrons are paired up hence they are not involved in bond formation called loan paired of electron (L.P.)
3. When sp3 hybridised O combines with 2 hydrogen atom forms Bond structure water.
