Which of the following lanthanoid ions is diamagnetic? (At. nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)

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Eu2+

Yb2+

Ce2+

Sm2+

answer is B.

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Detailed Solution

Sm2+Z=62 : Xe4f6 Eu2+Z=63 : Xe4f7 Yb2+Z=70 : Xe4f14 Ce2+Z=58 : Xe4f15d1Only Yb2+is diamagnetic.