1.

Generally transition elements form coloured compounds. But Sc^(+3) forms colourless compounds. Justify.

Answer»

Solution :(i) Electronic configuration of Sc
(ii) energy difference among the ORBITALS of ‘d-‘
SUBSHELL.
(iii) BASIC principle behind exhibition of colour
(iv) COMPARISON of electronic configuration of
alkali, alkaline earth and transition metals
(v)electronic configuration of Sc+3
(vi) comparison of electronic configuration of scan-
dium ion with other transition metal IONS


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