Atomic Structure: Aufbau Principle MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow

Aufbau PrincipleEasyQuestion 600219

Question

In Aufbau filling, orbitals are filled in order of increasing:

n + l value, and lower n first for same n+l

Aufbau filling order: subshells with lower (n+l) fill first. For same n+l, lower n fills first. This gives the order 1s, 2s, 2p, 3s, 3p, 4s, 3d, ...