(A) atoms of each element are stable and emit characteristic spectrum. (R) the spectrum provides useful information about the atomic structure.A. if both assertion and reason are true and reason is the correct explanation of assertion.B. if both assertion and reason are true but reason is not the correct explanation of assertion.C. if assertion is true but reason is false.D. if both assertion and reason are false.

(A) atoms of each element are stable and emit characteristic spectrum.

1.	(A) atoms of each element are stable and emit characteristic spectrum. (R) the spectrum provides useful information about the atomic structure.A. if both assertion and reason are true and reason is the correct explanation of assertion.B. if both assertion and reason are true but reason is not the correct explanation of assertion.C. if assertion is true but reason is false.D. if both assertion and reason are false.
Answer» Correct Answer - B Atoms of each element are stable and emit characteristic spectrum. The spectrum consists of a set of isolated parallel lines termed as line spectrum . It provides useful information about the atomic structure .