Which of the following species must have the | vedclass

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(C) The correct answer is $(c)$.$Cr$ $(Z=24)$: The electronic configuration is $[Ar] 3d^5 4s^1$. Each of the five $d$-orbitals $(d_{xy}, d_{yz}, d_{zx

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$Cu^{+}$

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(C) The correct answer is $(c)$.$Cr$ $(Z=24)$: The electronic configuration is $[Ar] 3d^5 4s^1$. Each of the five $d$-orbitals $(d_{xy}, d_{yz}, d_{zx}, d_{x^2-y^2}, d_{z^2})$ contains $1$ electron.$Fe^{3+}$ $(Z=26)$: The electronic configuration is $[Ar] 3d^5$. Each of the five $d$-orbitals contains $1$ electron.$Cu^{+}$ $(Z=29)$: The electronic configuration is $[Ar] 3d^{10}$. Each of the five $d$-orbitals contains $2$ electrons.Therefore,the $d_{xy}$ orbital in $Cu^{+}$ contains $2$ electrons,which is the maximum among the given options.

List-$I$ (Quantum Number)	List-$II$ (Information provided)
$A$. $m_l$	$I$. Shape of orbital
$B$. $m_s$	$II$. Size of orbital
$C$. $l$	$III$. Orientation of orbital
$D$. $n$	$IV$. Orientation of spin of electron

Which of the following species must have the maximum number of electrons in the $d_{xy}$ orbital?

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What are the electronic configurations of elements with atomic numbers $Z = 117$ and $Z = 120$?

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