How will you explain Hund's rule of multiplicity?
Answers
The rule states that for a given electron configuration, the lowest energy term is the one with the greatest value of spin multiplicity. This implies that if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pairs
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Solution :-
Hund's rule of Multiplicity states that pairing of electron does not take place until or unless all the orbitals in the same shell are singly - filled.
In other words, we can say that while filling electrons in orbitals of same shell, we would firstly fill one electron in each orbital. After all the orbitals are singly filled then only we can fill remaining electrons as a pair of two in each orbital.
More to Know :
As we know that Half filled and fully filled electronic configuration is always extra stable due to symmetry and high exchange energy.
For eg : In both chromium abd copper one electron from 4s orbital is transferred to 3d orbital to attain extra stable half filed and fully filled electronic configuration.