32pts) Part B. Spectroscope Analysis of Atomic Gases | Chegg.com
Lesson Explainer: Emission and Absorption Spectra | Nagwa
A special type of fluorescent tube contains the gas helium. When energized, it is lit by certain colors. What is this process where colored light is emitted from an atom? - Quora
Using diffraction gratings to identify elements
Solved Helium (He) Gas discharge tube: Bright line emission | Chegg.com