(C) The atomic number $Z = 24$ corresponds to Chromium $(Cr)$.The electronic configuration of $Cr$ is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1$.For $(n+\el

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(C) The atomic number $Z = 24$ corresponds to Chromium $(Cr)$.The electronic configuration of $Cr$ is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1$.For $(n+\ell) = 3$: The orbitals are $2p$ $(n=2, \ell=1)$ and $3s$ $(n=3, \ell=0)$. Total electrons $= 6 + 2 = 8$.For $(n+\ell) = 4$: The orbitals are $3p$ $(n=3, \ell=1)$ and $4s$ $(n=4, \ell=0)$. Total electrons $= 6 + 1 = 7$.For $(n+\ell) = 5$: The orbital is $3d$ $(n=3, \ell=2)$. Total electrons $= 5$.

Class 11 Chemistry Structure of Atom Quantum number, Electronic configuration and Shape of orbitals

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The number of electrons with $(n+\ell)$ values equal to $3, 4$ and $5$ in an element with atomic number $(Z) = 24$ are respectively $(n =$ principal quantum number and $\ell =$ azimuthal quantum number).

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A
$7, 8, 5$
B
$6, 8, 6$
C
$8, 7, 5$
D
$8, 8, 5$

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Structure of Atom

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Quantum number, Electronic configuration and Shape of orbitals

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Match the $LIST$-$I$ with $LIST$-$II$:
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$C$. $3p$ $III$. $2$ Radial nodes + No nodal plane
$D$. $4d$ $IV$. $1$ Radial node + No nodal plane

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The $39^{th}$ electron of an element enters which of the following subshells?

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Which of the following orbitals has zero probability of finding an electron in the $yz$ plane?

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List-$I$ (Orbital)	List-$II$ (Radial nodes and nodal plane)
$A$. $2s$	$I$. $1$ Radial node + two nodal planes
$B$. $3s$	$II$. $1$ Radial node + one nodal plane
$C$. $3p$	$III$. $2$ Radial nodes + No nodal plane
$D$. $4d$	$IV$. $1$ Radial node + No nodal plane

The number of electrons with $(n+\ell)$ values equal to $3, 4$ and $5$ in an element with atomic number $(Z) = 24$ are respectively $(n =$ principal quantum number and $\ell =$ azimuthal quantum number).

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Which of the following orbitals has zero probability of finding an electron in the $yz$ plane?

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Match the $LIST$-$I$ with $LIST$-$II$:
List-$I$ (Orbital) List-$II$ (Radial nodes and nodal plane)
$A$. $2s$ $I$. $1$ Radial node + two nodal planes
$B$. $3s$ $II$. $1$ Radial node + one nodal plane
$C$. $3p$ $III$. $2$ Radial nodes + No nodal plane
$D$. $4d$ $IV$. $1$ Radial node + No nodal plane