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, the 2s before the 2p, and so on.
2. Examine each electron configuration image provided. Each box represents an orbital, and the arrows represent electrons with their spins.
3. In the first image, the electron configuration shows electrons filling the 1s, 2s, and 2p orbitals. Check if the electrons are filling the orbitals in the correct order according to the Aufbau Principle.
4. In the second image, observe if any electrons are placed in higher energy orbitals before the lower ones are completely filled. This would indicate a violation of the Aufbau Principle.
5. Compare all the images to identify which one has electrons in higher energy orbitals while lower energy orbitals are not fully occupied. This configuration would be the one that violates the Aufbau Principle.