1. Light’s Particle-like Properties Energy is quantized into discrete bundles of energy Absorption spectra wavelengths are related to specific energy jumps between different energy levels

2. Each line on spectrum is a result of a specific energy transition

3. Molecular Absorption More complicated than atomic E = Eelect + Evib + Erot Much more energy levels that can absorb radiation, spectrum appears broader

4. Molecular Absorption Continuous spectra result from: 1.Liquids or solids packed closely therefore they are incapable of independent behavior 2.Complicated molecules involving many closely related energy levels so energy overlap exists 3.When unquantized energy bombards molecules in presence of solvent molecules, spectra broadens b/c many closely overlapping energies

5. Predict the spectra for the following 3.37144e-19 J 3.37487e-19 J Sodium Energy Transitions    *6.95838e-19 J    * 7.69898e-19 J n   *8.54968e-19 J    *9.61265e-19 J