Electron configuration Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What is the maximum number of electrons in a 3d sub-shell?
- A. 6
- B. 10
- C. 2
- D. 14
2. Which sub-shell is filled immediately after 3p?
- A. 3d
- B. 4p
- C. 4s
- D. 4d
3. What is the electron configuration of a Ca²⁺ ion (Z = 20)?
- A. 1s² 2s² 2p⁶ 3s² 3p⁶
- B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
- C. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
- D. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²
4. What is the electron configuration of a Zn²⁺ ion (Z = 30)?
- A. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s²
- B. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹ 4s¹
- C. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s²
- D. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰
5. How many unpaired electrons are in a ground-state carbon atom (1s² 2s² 2p²)?
- A. 0
- B. 2
- C. 3
- D. 4