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What is the most common oxidation state of lanthanides?(a) +2(b) +4(c) +6(d) +3The question was posed to me in a national level competition.This intriguing question originated from D and F-Block Elements in portion D and F-Block Elements of Chemistry – Class 12

Answer»

Correct CHOICE is (d) +3

To explain I would say: The most common and stable OXIDATION state of lanthanides is +3. Some elements also EXHIBIT +4 oxidation states. Some elements exhibit +2 oxidation state also due to their half-filled, fully-filled and noble GAS configuration.



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