Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values. Reason: Actinide elements are strongly paramagnetic.

Question

Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values. Reason: Actinide elements are strongly paramagnetic. (A) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. (B) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion. (C) If the Assertion is correct but Reason is incorrect. (D) If the Assertion is incorrect and Reason is correct.

Tardigrade Admin · Accepted Answer

The magnetic moment values are lesser than the theoretically predicted values due to the fact that 5 f electrons of actinides are less effectively shielded which results in quenching of orbital contribution.

Q. Assertion : Magnetic moment values of actinides are lesser than the theoretically predicted values.
Reason : Actinide elements are strongly paramagnetic.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If the Assertion is incorrect and Reason is correct.

The magnetic moment values are lesser than the theoretically predicted values due to the fact that $5 f$ electrons of actinides are less effectively shielded which results in quenching of orbital contribution.

Q. Assertion : Magnetic moment values of actinides are lesser than the theoretically predicted values. Reason : Actinide elements are strongly paramagnetic.