1. The spectrum of an excited gas is a series of discretelines because

a. In multielectron atoms, each electron emits a certain,unique wavelength.

b. Different atoms in the gas have different ionizationstates.

c. Other wavelengths are absorbed by the gas.

d. Electrons exist in quantized energy states, and onlycertain transitions are possible.

2. A low-pressure gas discharge tube emits

a. a discrete spectrum

b. a continuous spectrum

c. an absorption spectrum

d. a beta spectrum

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Answer 1 Option D Electrons exist in quantized energy s... View the full answer