Assertion :Elements like Rb, Cs, Tl, In, Ga and Sc were discovered when their minerals were analysed by spectrocopic methods. Reason: The characteristic lines in atomic spectra can be in chemical analysis to identify unknown atoms.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Spectroscopy is the study of the interaction of light with matter. Therefore, it has been used to distinguish between different matters, as each interacts differently with light, in some of the other regions of the electromagnetic spectrum. Thus various elements like $R b, C s, T l, I n, G a$ and $S c$ were discovered when their minerals were analysed by spectroscopic methods. As each element has specific transition energies which give distinguished absorption/emission spectra. And this specificity can be used as the tool in chemical analysis to identify unknown elements.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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