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The line spectra are characteristic of (A) Atoms in the excited state (B) Atoms is the ground state (C) Molecules in the excited state (D) Molecules in the ground state

The line spectra are characteristic of
 
(A) Atoms in the excited state
(B) Atoms is the ground state
(C) Molecules in the excited state
(D) Molecules in the ground state

Grade:11

1 Answers

Apurva Sharma
220 Points
5 years ago
A. Atom in excited stage.
 
Characteristic line spectra are produced when atoms are excited by X-ray photons or accelerated electrons. Upon such excitation, an inner-shell electron is ejected creating a vacancy. The vacancy is filled by electron of heigjer lying orbit. This electron transfer emits X-ray frequency of specific frequency which when taken through spectroscope gives spectral lines.
 

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