Q. State and explain Pauli's exclusion principle and Hund's rule of maximum multiplicity. Why are half-filled and fully filled electronic configurations more stable over the other configurations?
Dear Student
Pauli Exclusion principle states that two electron of an atom can not have all the four quantum numbers same or electrons occupying same energy levels are of opposite spin.
Hund's rule of multiplicity state that every orbital in sub-shell is firstly singly occupied with electrons having same spin and then are doubly occupied with opposite spin.
Half and fully-filled orbitals' electron can exchange their position among themselves which lead to decrease in energy with each exchange resulting in stability of half and fully filled configuration.
Pauli Exclusion principle states that two electron of an atom can not have all the four quantum numbers same or electrons occupying same energy levels are of opposite spin.
Hund's rule of multiplicity state that every orbital in sub-shell is firstly singly occupied with electrons having same spin and then are doubly occupied with opposite spin.
Half and fully-filled orbitals' electron can exchange their position among themselves which lead to decrease in energy with each exchange resulting in stability of half and fully filled configuration.