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Question
In the following electronic arrangement, which of the following is violated?
I: Hund's rule
II: Pauli's exclusion principle
III: Aufbau principle
In the following electronic arrangement, which of the following is violated?
I: Hund's rule
II: Pauli's exclusion principle
III: Aufbau principle
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Solution
The correct option is D I, II and III
According to Aufbau principle, in the ground state of an atom or ion, electrons first occupy the lowest energy orbital available to them and enter into higher energy orbitals only after the lower energy orbitals are filled.
Pauli's exclusion principle states that in an atom, no two electrons can have the same set of four quantum numbers.
Hund's rule states that every orbital in a subshell is singly occupied with one electron before pairing up of electrons can take place.
Hence, the given configuration violates all the three principles.
According to Aufbau principle, in the ground state of an atom or ion, electrons first occupy the lowest energy orbital available to them and enter into higher energy orbitals only after the lower energy orbitals are filled.
Pauli's exclusion principle states that in an atom, no two electrons can have the same set of four quantum numbers.
Hund's rule states that every orbital in a subshell is singly occupied with one electron before pairing up of electrons can take place.
Hence, the given configuration violates all the three principles.
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