HYDROGEN IS AN ATOM BUT IT EXISTS IN THE FORM OF HYDROGEN MOLECULE (GAS). IT'S SPECTRUM IS GIVE EMISSION LINE SPECTRUM THAT IS THE SPECTRUM CONTAINS NUMBER OF LINES.HERE LINE SPECTRUM INDICATES ATOMS.HOW IS IT POSSIBLE?

The hydrogen molecule which  has two H atoms weakly bound together emits only a molecular band spectrum which is in ehe infrared region.

These band lines are very closely spaced line spectrum. This is quite different from the line spectrum emitted by H atom  which is due to

electron transitions between atomic levels in H atom. The line spectra of H atom lie in a different region than the band spectrum of H molecule

and hence they are seen separately without confusion.

Approved

Dear student,

The hydrogen molecule which  has two H atoms weakly bound together emits only a molecular band spectrum which is in the infrared region.

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