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Q. Actinides

AIPMTAIPMT 1994The d-and f-Block Elements

Solution:

All actinides show different oxidation states such as $+2 +3 +4 +5$ and $+7$. However, $+3 $ oxidation state is most common among all the actinides. The wide range of oxidation states of actinides is attributed to the fact that the $5f , 6d$ and $7s$ energy levels are of comparable energies. Therefore, all these three sub-shells can participate.