S1.3 Electron configurations Quiz
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5 questions, one answer each
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1. Which transition in a hydrogen atom emits the photon of highest energy?
- A. n = 3 → n = 2
- B. n = 2 → n = 1
- C. n = 4 → n = 3
- D. n = 5 → n = 4
2. What is the condensed configuration of sulfur (Z = 16)?
- A. [Ne]3s²3p⁴
- B. [Ne]3s²3p⁶
- C. [Ar]3s²3p⁴
- D. [Ne]3p⁶
3. How many unpaired electrons are in a ground-state oxygen atom?
- A. 0
- B. 1
- C. 2
- D. 4
4. Which configuration is correct for Cu²⁺?
- A. [Ar]4s²3d⁷
- B. [Ar]4s¹3d⁸
- C. [Ar]3d⁹
- D. [Ar]3d¹⁰
5. Which light has the longest wavelength?
- A. Ultraviolet
- B. Violet
- C. Red
- D. Infrared