(A) The atomic number of $Cr$ is $24$. Its electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5$.For $l = 1$ (p-orbitals),we consider the $

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(A) The atomic number of $Cr$ is $24$. Its electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^5$.For $l = 1$ (p-orbitals),we consider the $2p$ and $3p$ subshells. The number of electrons is $6 + 6 = 12$.For $l = 2$ (d-orbitals),we consider the $3d$ subshell. The number of electrons is $5$.Therefore,the number of electrons with $l = 1$ and $l = 2$ are $12$ and $5$ respectively.

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

Medium

In the ground state of $Cr$,the number of electrons with $l = 1$ and $l = 2$ in its electronic configuration are respectively:

A
$12, 5$
B
$16, 4$
C
$16, 5$
D
$12, 4$

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Class 11

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Structure of Atom

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Quantum number, Electronic configuration and Shape of orbitals

Following Hund's rule,which element contains six unpaired electrons?

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The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1$. This represents its

EasyIIT 2000

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Which of the following sets of orbitals may degenerate?

Easy

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Consider the following sets of quantum numbers:
$Set$ $(n)-(l)-(m)-(s)$
$(i)$ $(3)-(2)-(1)-(+1/2)$
$(ii)$ $(2)-(2)-(1)-(+1/2)$
$(iii)$ $(4)-(3)-(-2)-(-1/2)$
$(iv)$ $(1)-(0)-(-1)-(-1/2)$
$(v)$ $(3)-(2)-(3)-(+1/2)$

Which of the following sets of quantum numbers is not possible?

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Which of the following sets of species has the $3^{rd}$ principal energy level $(n=3)$ completely filled?

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$Set$	$(n)-(l)-(m)-(s)$
$(i)$	$(3)-(2)-(1)-(+1/2)$
$(ii)$	$(2)-(2)-(1)-(+1/2)$
$(iii)$	$(4)-(3)-(-2)-(-1/2)$
$(iv)$	$(1)-(0)-(-1)-(-1/2)$
$(v)$	$(3)-(2)-(3)-(+1/2)$

In the ground state of $Cr$,the number of electrons with $l = 1$ and $l = 2$ in its electronic configuration are respectively:

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Following Hund's rule,which element contains six unpaired electrons?

The electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^5 4s^1$. This represents its

Which of the following sets of orbitals may degenerate?

Consider the following sets of quantum numbers:$Set$$(n)-(l)-(m)-(s)$$(i)$$(3)-(2)-(1)-(+1/2)$$(ii)$$(2)-(2)-(1)-(+1/2)$$(iii)$$(4)-(3)-(-2)-(-1/2)$$(iv)$$(1)-(0)-(-1)-(-1/2)$$(v)$$(3)-(2)-(3)-(+1/2)$Which of the following sets of quantum numbers is not possible?

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Consider the following sets of quantum numbers:
$Set$ $(n)-(l)-(m)-(s)$
$(i)$ $(3)-(2)-(1)-(+1/2)$
$(ii)$ $(2)-(2)-(1)-(+1/2)$
$(iii)$ $(4)-(3)-(-2)-(-1/2)$
$(iv)$ $(1)-(0)-(-1)-(-1/2)$
$(v)$ $(3)-(2)-(3)-(+1/2)$

Which of the following sets of quantum numbers is not possible?