7B10  Spectra
            .10 Emission Spectra Tower
            .11 Flame Salts
            .20 Project Spectral Lines
7B11  Absorption
7B13  Resonance Radiation
            .30 Demonstration Laser
            .51 Fluorescence
            .60 Phosphorescence
7B20  Fine Splitting
7B30  Ionization Potential
7B35  Electron Properties
            .40 Maltese Cross
            .75 Plasma Globe
7B50  Atomic Models
            .10 Electron Orbital Models
            .13 Orbiting Electron
            .2x Vibration Modes