Post-UTME Chemistry 2009 Objective — Question 14
Question 14 of 16 from the Post-UTME Screening (Post-UTME) Chemistry 2009 Objective paper, with the correct answer and a full explanation.
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Which of the 3d, 4s, 4p, 4d has the lowest energy?
- A. 3d
- B. 4sCorrect
- C. 4p
- D. 4d
Explanation
By the Aufbau filling order, the 4s orbital is filled before 3d, reflecting its lower energy at this point.
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