Question

discharged tubes studied
when the gas in the discharge tube is pure as it will be in this experiment, the essential excitation and emission steps in the discharge can be summarized by just reactions (5.2.1) and (5.2.2a). bright line spectra from four different gas discharge tubes, hydrogen, helium, neon, and argon, will be studied. table 5.2.1 summarizes the operating appearance of these discharge tubes. the red - orange light from a neon discharge tube should be familiar as it is used commonly in commercial signage where it is refer to simply as a neon light or a neon sign.
question 5.2.2
identify the gas in this electrical discharge from its appearence.
helium
hydrogen
helium
neon
argon
table 5.2.1 gas discharge tube properties
gas color appearance
hydrogen pink
helium white
neon red - orange
argon violet

Explanation:

By referring to Table 5.2.1 which lists the colors and appearances of different gas - discharge tubes, we can match the appearance of the given electrical discharge to the corresponding gas.

Answer:

helium