Which electron configuration represents a violation of Hund's Rule? 

• A.
• B.
• C.
• D.

Answer: (D)

Verified step by step guidance

1. Understand Hund's Rule: Hund's Rule states that 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.
2. Analyze the first image: The first image shows two electrons in the first orbital with opposite spins, which is correct according to Hund's Rule.
3. Analyze the second image: The second image shows two electrons in the first orbital with opposite spins, and one electron in the second orbital. This configuration follows Hund's Rule.
4. Analyze the third image: The third image shows two electrons in the first orbital with opposite spins, and one electron in the second orbital. This configuration follows Hund's Rule.
5. Analyze the fourth image: The fourth image shows two electrons in the first orbital with opposite spins, and one electron in the second orbital. This configuration follows Hund's Rule. However, if there were more electrons, they should be placed in the next available orbital with the same spin before pairing up in the second orbital.