— CHAPTER MASTERY · CLASS 12

The d and f-Block Elements Important Questions.

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Key Concepts in The d and f-Block Elements

Transition elements: d-block configuration, variable oxidation statesProperties: colour, magnetic behaviour, catalytic activity, complex formationImportant compounds: K₂Cr₂O₇ (dichromate) and KMnO₄ (permanganate)Lanthanides: 4f elements, lanthanide contraction, cerium, mischmetalActinides: 5f elements, uranium and thorium; nuclear applications

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