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

Step-by-step solution

Lanthanoid ion with no unpaired electron is diamagnetic in nature. array ll Ce ₅₈ & =[ Xe ] 4 f^2 5 d^0 6 s^2 C e²⁺ & =[ Xe ] 4 f^2 (two unpaired electrons) array aligned Sm ₆₂ & =[ Xe ] 4 f^6 5 d^0 6 s^2 Sm ²⁺ & =[ Xe ] 4 f^6 (s i x unpaired electrons) Eu ₆₃ & =[ Xe ] 4 f^7 5 d^0 6 s^2 Eu ²⁺ & =[ Xe ] 4 f^7 (seven unpaired electrons) Yb ₇₀ & = [ X _e ] 4 f¹⁴ 5 d^0 6 s^2 Yb ²⁺ & =[ Xe ] 4 f¹⁴ (no unpaired electrons) aligned Because of the absence of unpaired electrons, Yb ²⁺ is diamagnetic.