🔬 Electron Configuration Simulator
Atomic StructureWhat's happening? Electrons fill orbitals by Aufbau principle (lowest energy first). Hund's rule: fill each orbital singly before pairing. Pauli: max 2 electrons per orbital.
Electron Config is a core concept tested across JEE Main and Advanced.
Understanding this concept visually builds the intuition you need to solve numerical problems faster and avoid common mistakes.
Key formula
Electron Config Formula
Core Formula
1s² 2s² 2p⁶...
Adjust the sliders above and watch how changing each variable affects the result in real time.
JEE Application
This concept appears in both numerical and conceptual questions. Master the formula and the visual intuition together.
Step-by-step
How to approach Electron Config problems
- Identify the variables — list what's given and what's asked.
- Apply the core formula — 1s² 2s² 2p⁶....
- Check units — convert to SI units before calculating.
- Verify with intuition — does the answer make physical sense?
Common mistakes
What students get wrong
❌ Wrong units
Always convert to SI units before plugging into formulas.
❌ Forgetting sign conventions
Direction matters. Set up your coordinate system first.
FAQs
Electron Config Questions
How does this concept appear in JEE?
Expect 1-2 questions per paper. Focus on understanding the relationship between variables visually.
What's the most common mistake?
Using wrong units or forgetting to convert. Always check your units first.