Which of the following lanthanide ion is paramagnetic?

Question

Which of the following lanthanide ion is paramagnetic? (A) Ce4+ (B) Yb2+ (C) Lu3+ (D) Eu2+

Tardigrade Admin · Accepted Answer

Ce arrow[ Xe ] 4 f1 5 d1 6 s 2 ; Ce 4+ arrow[ Xe ] Y b arrow[ Xe ] 4 f14 6 s 2 ; Y b2+ arrow[ Xe ] 4 f14 Lu arrow[ Xe ] 4 f14 5 d1 6 s 2 ; Lu 3+ arrow[ Xe ] 4 f14 Eu arrow[ Xe ] 4 f7 6 s2 ; Eu 2+ arrow[ Xe ] 4 f7

Q. Which of the following lanthanide ion is paramagnetic?

$C e^{4 +}$

$Y b^{2 +}$

$L u^{3 +}$

$E u^{2 +}$

$C e \to [X e] 4 f^{1} 5 d^{1} 6 s^{2}; C e^{4 +} \to [X e]$
$Yb \to [X e] 4 f^{14} 6 s^{2}; Y b^{2 +} \to [X e] 4 f^{14}$
$Lu \to [X e] 4 f^{14} 5 d^{1} 6 s^{2}; L u^{3 +} \to [X e] 4 f^{14}$
$E u \to [X e] 4 f^{7} 6 s^{2}; E u^{2 +} \to [X e] 4 f^{7}$

Q. Which of the following lanthanide ion is paramagnetic?

Ce4+

Yb2+

Lu3+

Eu2+

Ce→[Xe]4f15d16s2;Ce4+→[Xe] Yb→[Xe]4f146s2;Yb2+→[Xe]4f14 Lu→[Xe]4f145d16s2;Lu3+→[Xe]4f14 Eu→[Xe]4f76s2;Eu2+→[Xe]4f7

$C e^{4 +}$

$Y b^{2 +}$

$L u^{3 +}$

$E u^{2 +}$

$C e \to [X e] 4 f^{1} 5 d^{1} 6 s^{2}; C e^{4 +} \to [X e]$
$Yb \to [X e] 4 f^{14} 6 s^{2}; Y b^{2 +} \to [X e] 4 f^{14}$
$Lu \to [X e] 4 f^{14} 5 d^{1} 6 s^{2}; L u^{3 +} \to [X e] 4 f^{14}$
$E u \to [X e] 4 f^{7} 6 s^{2}; E u^{2 +} \to [X e] 4 f^{7}$