Question

expalin about hund s rule​

Answer 1

Hund's rule : Every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied and all electrons in singly occupied orbitals have the same spin.

Answer 2

Answer:

Hund's rule: The orbital of equal energy (degenerate) are occupied with one electron each before pairing of electron starts.

Explanation :

. .

According to this rule electron pairing in orbital starts only when all available empty orbitals of same energy are singly occupied.