Which of the following is the correct statement about the magnetic properties of lanthanoids?

Question

Canvas Classes · Accepted Answer

Magnetic properties of lanthanoids:

A. Diamagnetic due to fully filled 4f — FALSE ✗

Only  () and  () are diamagnetic. Most others have unpaired 4f electrons.

B. Most lanthanoids are paramagnetic due to unpaired 4f electrons — TRUE ✓

Lanthanoids from Ce to Yb have partially filled 4f orbitals with unpaired electrons → paramagnetic.

C. Ferromagnetic — FALSE ✗

Ferromagnetism is a bulk property of certain metals (Fe, Co, Ni). Lanthanoids are paramagnetic, not ferromagnetic.

D. Magnetic moment

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