So if energy levels, or eV of electrons, do not change with molecular bonding, how are electrons influencing each other.? In glass, when individual atoms of silicon, sodium, and calcium come together, to form glass, the molecular bonding does not change the energy levels of the electrons for glass to transmission, light. Someone told me glass" the atoms, or electrons are influencing each other". What does influencing each other meanmean. What changes the eV of the electrons specifically for light to transmission, through glass. I am grateful for your help, anything helps even a few words.