The pair of lanthanoid ions which are diamagnetic is

Question

Professor PC Thomas Classes · Answer

(a) : Among the given lanthanoid ions, $\mathrm{Ce}^{4+}$ and \ $\mathrm{Yb}^{2+}$ are diamagnetic in nature. Electronic configuration of $\mathrm{Ce}:[\mathrm{Xe}] 4 f^1 5 d^1 6 s^2$ \ and $\mathrm{Ce}^{4+}:[\mathrm{Xe}]$ Electronic configuration of $\mathrm{Yb}:[\mathrm{Xe}] 4 f^{14} 6 s^2$ \ and $\mathrm{Yb}^{2+}:[\mathrm{Xe}] 4 f^{14}$