Electronic configuration of chromium is
Electronic configuration of chromium is
The correct option is A [Ar] 3d5 4s1
Aufbau Principle, Pauli’s Exclusion Principle, and Hund’s Rule of Maximum Multiplicity are different rules governing the filling of electrons in different subshells.
They are described briefly as follows -
Aufbau Principle: The filling of subshells in atoms is based on their energies. Electrons first occupy the subshell with the lowest energy and progressively fill the other subshells in increasing order of energy.
Pauli’s Exclusion Principle:
According to Pauli’s exclusion principle, “an orbital cannot accommodate more than two electrons. If there are two electrons in an orbital they must have opposite spins.”
Hund’s Rule of Maximum Multiplicity :
According to this rule: “no electron pairing takes place in the orbitals with equivalent energy until each orbital in the given subshell contains one electron & the spins of all unpaired electrons are parallel i.e. in the same direction”.
Conclusion Statement: Option (a) is the correct answer.
[Ar] 3d5 4s1
Aufbau Principle, Pauli’s Exclusion Principle, and Hund’s Rule of Maximum Multiplicity are different rules governing the filling of electrons in different subshells.
They are described briefly as follows -
Aufbau Principle: The filling of subshells in atoms is based on their energies. Electrons first occupy the subshell with the lowest energy and progressively fill the other subshells in increasing order of energy.
Pauli’s Exclusion Principle:
According to Pauli’s exclusion principle, “an orbital cannot accommodate more than two electrons. If there are two electrons in an orbital they must have opposite spins.”
Hund’s Rule of Maximum Multiplicity :
According to this rule: “no electron pairing takes place in the orbitals with equivalent energy until each orbital in the given subshell contains one electron & the spins of all unpaired electrons are parallel i.e. in the same direction”.
Conclusion Statement: Option (a) is the correct answer.
