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(A) The atomic number of oxygen $(O)$ is $8$. Its electronic configuration is $1s^2 2s^2 2p^4$. Hund's rule of maximum multiplicity states that electr

Vedclass · Accepted Answer

$1s^2 2s^2 2p_x^2 2p_y^1 2p_z^1$

Vedclass · Answer

(A) The atomic number of oxygen $(O)$ is $8$. Its electronic configuration is $1s^2 2s^2 2p^4$. Hund's rule of maximum multiplicity states that electron pairing in degenerate orbitals (orbitals of the same subshell) does not occur until each orbital is singly occupied. For the $2p$ subshell containing $4$ electrons,the electrons will occupy the $2p_x, 2p_y,$ and $2p_z$ orbitals singly first,and then the fourth electron will pair up in one of the orbitals. Thus,the configuration is $1s^2 2s^2 2p_x^2 2p_y^1 2p_z^1$ (or any equivalent arrangement like $2p_x^1 2p_y^2 2p_z^1$). Therefore,option $A$ is correct.

Set	$(n, l, m_l)$
$A$	$(3, 3, -3)$
$B$	$(3, 2, -2)$
$C$	$(2, 1, +1)$
$D$	$(2, 2, +2)$

Which electronic configuration for oxygen is correct according to Hund's rule of maximum multiplicity?

Similar Questions

The orbital angular momentum of an electron in an $s$ orbital is:

Which of the following combinations of quantum numbers is allowed?

The magnetic quantum number for an electron when the value of principal quantum number is $2$ can have ............ values.

Explain $d$ orbital.

Consider the following sets of quantum numbers $(n, l, m_l)$:

Set $(n, l, m_l)$

$A$ $(3, 3, -3)$

$B$ $(3, 2, -2)$

$C$ $(2, 1, +1)$

$D$ $(2, 2, +2)$

The number of correct sets of quantum numbers is $....$.

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