Which of the following sets of quantum number | vedclass

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(B) The electronic configuration of $Cr$ $(Z=24)$ is $[Ar]_{18} 4s^1 3d^5$.Electrons $1$ to $18$ are filled in the $Ar$ core.The $19^{	ext{th}}$ elec

Vedclass · Accepted Answer

$(4, 0, 0, +\frac{1}{2})$

Vedclass · Answer

(B) The electronic configuration of $Cr$ $(Z=24)$ is $[Ar]_{18} 4s^1 3d^5$.Electrons $1$ to $18$ are filled in the $Ar$ core.The $19^{	ext{th}}$ electron is the first electron to enter the $4s$ orbital.For the $4s$ orbital: principal quantum number $n=4$, azimuthal quantum number $l=0$, magnetic quantum number $m_l=0$, and spin quantum number $m_s=+\frac{1}{2}$.Thus, the set of quantum numbers is $(4, 0, 0, +\frac{1}{2})$.

Column-$I$	Column-$II$
$(a)$ $4s$	$(p)$ Circular orbit around nucleus
$(b)$ $4p$	$(q)$ Non-directional orbital
$(c)$ $1s$	$(r)$ Angular momentum $= 2h/\pi$
$(d)$ $3d$	$(s)$ Radial node is zero

Which of the following sets of quantum numbers represents the $19^{\text{th}}$ electron of $Cr$ $(Z=24)$?

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Match the columns and choose the correct option:

Column-$I$ Column-$II$

$(a)$ $4s$ $(p)$ Circular orbit around nucleus

$(b)$ $4p$ $(q)$ Non-directional orbital

$(c)$ $1s$ $(r)$ Angular momentum $= 2h/\pi$

$(d)$ $3d$ $(s)$ Radial node is zero

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