Electron configuration Quiz
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5 questions, one answer each
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1. Which is the electron configuration of nitrogen (7 electrons)?
- A. 2,4
- B. 2,5
- C. 2,6
- D. 2,8,5
2. An atom has the configuration 2,8,2. In which group and period is it?
- A. Group 2, period 3
- B. Group 3, period 2
- C. Group 2, period 2
- D. Group 8, period 3
3. Which atom has a full outer shell?
- A. Fluorine, 2,7
- B. Sodium, 2,8,1
- C. Neon, 2,8
- D. Beryllium, 2,2
4. An element has three shells and 5 outer electrons. Which is it?
- A. Nitrogen
- B. Phosphorus
- C. Argon
- D. Silicon
5. Potassium has 19 electrons. What is its configuration?
- A. 2,8,9
- B. 2,8,8,1
- C. 2,9,8
- D. 2,8,1,8