WAEC Chemistry 2013 Objective — Question 6
Question 6 of 50 from the West African Examinations Council (WAEC) Chemistry 2013 Objective paper, with the correct answer and a full explanation.
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Which of the following arrangements represents the correct order of electronic energy level?
- A. 1s 2p 2s 3p 3s 3d 4s
- B. 1s 2s 2p 3s 3p 3d 4s
- C. 1s 2s 2p 3s 3p 4s 3dCorrect
- D. 1s 2s 3s 2p 3p 4s 3d
Explanation
The correct order of increasing energy level (Aufbau order) is 1s 2s 2p 3s 3p 4s 3d.
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