List of top Chemistry Questions on The Actinoids asked in CBSE Class XII

Assertion (A) : Actinoids show irregularities in their electronic configurations.

Reason (R) : Due to varying stabilities of \( f^0 \), \( f^7 \) and \( f^{14} \) occupancies of the 5f orbitals.

Actinoids show larger number of oxidation states :
Actinoids show larger number of oxidation states :
Assertion (A): Actinoids show irregularities in their electronic configurations.
Reason (R): In actinoids 5f, 6d and 7s orbitals are of comparable energies.
Assertion (A) : Actinoids show wide range of oxidation states.
Reason (R) : This is due to comparable energies of 5f, 6d and 7s orbitals.