*Why are electrons confined to bands where they can posses a partial quantum of energy (right?) as opposed to descrete energy levels in quantum dots? *Why do electrons behave differently in crystaline structures? *How do electrons behave in crystaline structure? (like bouncing back and forth) and why? *How and why are the energy levels changed when spatial restriction occurs? *Why does spatial restriction occur? *What coordinate systems are used for the space and time coordinates of the Schrodinger equation?