Which of the following has the maximum number | vedclass

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(C) The electronic configuration of $Fe$ $(Z=26)$ is $[Ar] 3d^6 4s^2$. $1$. For $Fe$: $3d^6 4s^2$. The $3d$ subshell has $6$ electrons,which means $4$

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$Fe^{3+}$

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(C) The electronic configuration of $Fe$ $(Z=26)$ is $[Ar] 3d^6 4s^2$. $1$. For $Fe$: $3d^6 4s^2$. The $3d$ subshell has $6$ electrons,which means $4$ unpaired electrons. $2$. For $Fe^{2+}$: $[Ar] 3d^6$. The $3d$ subshell has $6$ electrons,which means $4$ unpaired electrons. $3$. For $Fe^{3+}$: $[Ar] 3d^5$. The $3d$ subshell has $5$ electrons,which means $5$ unpaired electrons. $4$. For $Fe^{4+}$: $[Ar] 3d^4$. The $3d$ subshell has $4$ electrons,which means $4$ unpaired electrons. Thus,$Fe^{3+}$ has the maximum number of unpaired electrons $(5)$.

Which of the following has the maximum number of unpaired electrons? (Atomic number of $Fe = 26$)

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