⚛️ Electron Configuration Quiz
Can you figure out how electrons are arranged in atoms? Test your skills in this chemistry challenge!
Configure your quiz settings and click "Start Quiz" to begin
You can select question types, element range, and other options in the left panel
Quiz Results
Performance Summary
🔍 Electron Configuration Rules
Electrons fill orbitals starting from the lowest energy level to the highest. The order is: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.
Every orbital in a subshell gets one electron before any gets two electrons. Electrons in singly occupied orbitals have the same spin (parallel spins).
No two electrons can have the same set of four quantum numbers. This means an orbital can hold at most two electrons, and they must have opposite spins.
Common Electron Configurations
| Element | Atomic Number | Configuration |
|---|---|---|
| Hydrogen | 1 | 1s¹ |
| Helium | 2 | 1s² |
| Lithium | 3 | 1s² 2s¹ |
| Carbon | 6 | 1s² 2s² 2p² |
| Neon | 10 | 1s² 2s² 2p⁶ |
| Sodium | 11 | 1s² 2s² 2p⁶ 3s¹ |
| Chlorine | 17 | 1s² 2s² 2p⁶ 3s² 3p⁵ |
🔍 How to Use This Quiz
- Click "Start Quiz" to begin your atomic journey.
- Select the correct electron configuration from multiple choices.
- For fill-in-the-blank questions, type the complete configuration.
- For builder questions, click orbitals in the correct order.
- Instant feedback appears with explanations after each question.
- At the end, view your results and compare with your past attempts.