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Hund's Rule

Statement-I: ...

Question

$Statement-I:$ No two electrons in an atom can have the same set of four quantum numbers.
$Statement-II:$ Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital of the subshell has got one electron each. In light of the above statements, choose the correct answer

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Solution

Answer (3)
Only two electrons may exist in the same orbital and these electrons must have opposite spin.

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Q. Which of the following statements related to the modern periodic table is incorrect?
(a) The p-block has 6 columns because a maximum of 6 electrons can occupy all
the orbitals in a p-shell
(b) The d-block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in a d-subshell
(c) Each block contains a number of columns equal to the number of electrons that can occupy that subshell
(d) The block indicates value of azimuthal quantum number (I) for the last subshell that received electrons in building up the electronic configuration

Q. Match the following rules with their statements :

	Rules		Statements
A	Hund’s Rule	(i)	No two electrons in an atom can have the same set of four quantum numbers.
B	Aufbau Principle	(ii)	Half-filled and completely filled orbitals have extra stability.
C	Pauli Exclusion Principle	(iii)	Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied.
D	Heisenberg’s Uncertainty	(iv)	It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously.
		(v)	In the ground state of atoms, orbitals are filled in the order of their increasing energies

Q. Match the following:

Rules	Statements
A) Hund's rule of maximum multiplicity	P) No two electrons in an atom can have the same set of quantum numbers
B) Aufbau principle	Q) Half-filled and completely filled orbitals have extra stability
C) Pauli's exclusion principle	R) Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied
D) Hiesenberg's Uncertainity Principle	S) It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously
	T) In the ground state of atoms, orbitals are filled in the order of their increasing energies

Q. Match the following:

Rules	Statements
A) Hund's rule of maximum multiplicity	P) No two electrons in an atom can have the same set of quantum numbers
B) Aufbau principle	Q) Half-filled and completely filled orbitals have extra stability
C) Pauli's exclusion principle	R) Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied
D) Hiesenberg's Uncertainity Principle	S) It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously
	T) In the ground state of atoms, orbitals are filled in the order of their increasing energies

Q. Statement I: p orbital can accomadate 6 electrons.
Statement II: No two electrons in an atom can have the same set of four quantum numbers.

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