Physics · Atomic Spectra
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Which one of the following will produce a pink colour in a discharge tube?
- A
Neon
- B
Nitrogen
- C
Helium
- D
Oxygen
A tube containing charged electrodes and filled with a gas in which ionization is induced by an electric field. The gas molecules emit light as they return to the ground state. Each gas has a characteristic colour in the discharge tube, shown in the figure below.
A) Neon has a red colour in the discharge tube.
B) Nitrogen has a purple colour in the discharge tube.
C) Helium has a pink colour in the discharge tube.
D) Oxygen has a violet colour in the discharge tube.
Therefore, C is the correct answer since He has a pink colour in the discharge tube.
Neon has a red colour in the discharge tube.
Nitrogen has a purple colour in the discharge tube.
Helium has a pink colour in the discharge tube.
Oxygen has a violet colour in the discharge tube.
Tagged under Physics · Atomic Spectra · 2005