Question

state explain hund's rules

Answer 1

Hunds rule states that pairing of the electron in the orbitals belonging to the same subshell does not take place at until each orbital belonging to that subshell has got an electron each
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Answer 2

Hund's Rule. 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