Among lanthanoid la^la3+& lu³⁺ions are

A)paramagnetic B)Diamagnetic C) ferromagnetic

D)All of these

Please with explaination

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Solution

The correct answer is option C.

Ions which contain all paired electrons are diamagnetic while those containing unpaired electrons are paramagnetic . Among the lanthanides , La³⁺ [4f ⁰] & Lu³⁺ [4f ¹⁴] are diamagnetic. All trivalent lanthanide ions are paramagnetic due to unpaired electrons.

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