Which electron configuration represents a violation of the Auf Bau Principle? 

• A.
• B.
• C.
• D.

Answer: (B)

Verified step by step guidance

1. The Aufbau Principle states that electrons fill orbitals starting from the lowest energy level to the highest. This means that electrons will fill the 1s orbital before the 2s orbital, and so on.
2. Examine each electron configuration provided in the images. Look for any configuration where an electron is placed in a higher energy orbital before the lower energy orbitals are completely filled.
3. In the first image, check if the 1s orbital is completely filled before electrons are placed in the 2s orbital.
4. In the second image, verify if the 2s orbital is filled before electrons are placed in the 2p orbital.
5. Identify the configuration where electrons are placed in a higher energy orbital without completely filling the lower energy orbitals first, which would indicate a violation of the Aufbau Principle.