The gas in question must be neon.
The spectrum can be used to identify a gas. The idea of a spectrum is adapted from the Bohr model of the atom. It stems from the change in the energy level of an electron in the atom.
The gases that could be used in a bulb are; hydrogen, Helium, Neon, Argon, Krypton, Xenon. If we look at the attached chart that shows the maximum wavelength of each gas, we will notice that that of neon is fairly constant and it has the highest number of lines in the spectrum.
Based on the strength of the all the evidences as shown above, the gas in question must be neon.
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Missing parts;
I NEED HELP ASAP! Compare the spectrum of the unknown gas collected at the bulb company
with the data in your table. Which gas is leaking into the lab? Make a claim
and support your claim with evidence.
The leaking gas is: ___________________________________________
Evidence: