Molecular Orbital Theory
1.1 Which model, the Lewis electron dotstructure or the MO energy level diagram, better describes thebonding in O2? Remember that liquid O2 isattracted into the magnetic field of a large magnet.
True or False.
_____ MO theory allows us to avoid the use of resonance.
_____ Resonance is a concept which arises from the limitationsof Lewis electron dot structures
1.2 As we go from Li2 toLi3 to Li4 to Lin, the number ofmolecular orbitals formed from the 2s atomic orbitals goes from 2to __ to __ to __ respectively, and the spacing between energylevels _________.
1.3 In the caseof a metal, the lowest unoccupied MO is only infinitesimally higherin energy than the highest occupied MO, so it takes very littleenergy to cause electrons to move in a metal wire. In the case of asemiconductor, there is a _____ band gap between the full valenceband and the empty conduction band. In the case of an insulator,there is a _____ band gap between the full valence band and theempty conduction band.
