Which one of the following ions exhibits para | vedclass

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(C) Paramagnetism is exhibited by ions that have unpaired electrons in their electronic configuration.$1$. $Lr^{3+}$ $(Z=103)$: The electronic configu

Vedclass · Accepted Answer

$Th^{3+}$

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(C) Paramagnetism is exhibited by ions that have unpaired electrons in their electronic configuration.$1$. $Lr^{3+}$ $(Z=103)$: The electronic configuration of $Lr$ is $[Rn] 5f^{14} 6d^1 7s^2$. $Lr^{3+}$ is $[Rn] 5f^{14}$,which has no unpaired electrons (diamagnetic).$2$. $Ac^{3+}$ $(Z=89)$: The electronic configuration of $Ac$ is $[Rn] 6d^1 7s^2$. $Ac^{3+}$ is $[Rn]$,which has no unpaired electrons (diamagnetic).$3$. $Th^{3+}$ $(Z=90)$: The electronic configuration of $Th$ is $[Rn] 6d^2 7s^2$. $Th^{3+}$ is $[Rn] 5f^1$,which has $1$ unpaired electron (paramagnetic).$4$. $Lu^{3+}$ $(Z=71)$: The electronic configuration of $Lu$ is $[Xe] 4f^{14} 5d^1 6s^2$. $Lu^{3+}$ is $[Xe] 4f^{14}$,which has no unpaired electrons (diamagnetic).Therefore,$Th^{3+}$ is the only paramagnetic ion among the given options.

Which one of the following ions exhibits paramagnetic property?

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