The UV-visible absorption bands in the spectra of lanthanoid ions are ' X ', probably because of the excitation of electrons involving ' Y '. The ' X ' and ' Y ', respectively, are :

Question

The UV-visible absorption bands in the spectra of lanthanoid ions are ' X ', probably because of the excitation of electrons involving ' Y '. The ' X ' and ' Y ', respectively, are :, Broad and f orbitals, Narrow and f orbitals, Broad and d and f orbitals, Narrow and d and f orbitals

MARKS App · Accepted Answer

In lanthanoids, absorption bands are narrow because of excitation within f-level.

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