Why line spectra is regarded as the fingerprints of atoms ?

Spectral lines are regarded as the finger prints of the elements. Why?

Line spectra are due to

Why is the line spectrum of an element known as the fingerprint of its atoms?

Line emission spectra are often called finger print of atoms. a) Justify the above statement

The study of emission line spectra of a material serve as a fingerprint for identification of the gas. Draw energy level diagram of hydrogen atom?

The study of emission line spectra of a material serve as a fingerprint for identification of the gas. Name different series of lines observed in hydro gen spectrum.

The study of emission line spectra of a material serve as a fingerprint for identification of the gas. Write down the Balmer formula for wavelength of H_alpha line.

The study of emission line spectra of a material serve as a fingerprint for identification of the gas. Given Rydberg constant as 1.097 * 10^7m^-1 . Find the longest and shortest wavelength limit of Baler Series.

Line spectra is characteristic of: