A gaseous sample of Li2+ was observed in its fourth excited state to conduct an atomic emission spectrum experiment. 1. Multiple bright lines were observed on a dark background in their final emission spectrum. Explain the physical meaning of the bright lines on the spectrum. Use an energy level diagram to predict how many lines should be observed? 2. What is the wavelength of the first line (low wavelength lines appear first) on the emission spectrum. 3. What is the energy (estimated) required to form Li3+ from Li2+ (second excited state). What type of EM radiation is needed for this process to take place