Question

a. the number of electrons used is incorrect. b. the orbitals are not in the correct sequence. c. the orbital diagram violates hunds rule. d. none of the above

Explanation:

Hund's rule states that electrons will first singly occupy degenerate orbitals with parallel spins before pairing up. In the given 2p - orbital diagram, electrons are paired up in the orbitals instead of first singly - occupying them. So, it violates Hund's rule.

Answer:

C. The orbital diagram violates Hund's rule.