Question

which of the following cannot give band spectrum
a)Hydrogen  b )Oxygen  c)Helium  d)Nitrogen 

Answer 1

only helium can make a spectrum band therefore hydrogen,helium n nitrogen cannot make a spectrum band

Answer 2

Answer:

The correct answer is c)Helium.

Explanation:

• Band spectra is the name assigned to groups of lines so closely spaced that each group seems to be a band, e.g., nitrogen spectrum. Band spectra, or molecular spectra, are created by molecules radiating their rotational or vibrational energies, or both simultaneously.
• Atoms are learned as a line spectrum because the radiation (light) emitted consists of a series of sharp lines.

• Helium is monoatomic. It creates an atomic (or) line spectrum only.

Therefore, c)Helium cannot give band spectrum.

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