GKFix MCQ Question

What is the correct order of filling orbitals according to the Aufbau principle?

• A. 1s, 2s, 3s, 2p, 3p, 4s
• B. 1s, 2p, 2s, 3s, 3p, 4s
• C. 1s, 2s, 2p, 3s, 3p, 4s, 3d
• D. 1s, 2s, 3d, 2p, 3s, 3p, 4s