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Verified Answer & Explanation⌄

Correct Answer: B) 3d

Concept Explanation

Using the (n + ℓ) rule: 3s = 3 3p = 4 4s = 4 3d = 5 Therefore, 3d has the highest energy.

Topic: Aufbau Principle and Orbital EnergyPractice more Aufbau Principle and Orbital Energy MCQs →