Electron Towers

v0.17r0 — Mobile Responsive + Testing + diagonal Aufbau + Exceptions + Noble-gas shorthand

Study Guide

Mode

Ion

0

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s f d p

Auto-play Exceptions

Timer 00:00

Streak 0

Selected: —

Electrons: 0 / 0

Ion State: —

Config: —

Shorthand: —

Score

0

Correct +10 • Hund single +5 • Pauli pair +15 • Wrong −5

Move-in Order (Aufbau)

Learn as you play

Aufbau principle

Electrons occupy the lowest-energy available subshells first.

Hund's rule

In a set of degenerate orbitals (p, d, f), place one electron in each with the same spin before pairing.

Pauli exclusion principle

Each orbital holds at most two electrons and they must have opposite spins (↑↓).

Energy ↑

Lobby — Incoming Tenants

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© 2025 Electron Towers APP • Stable + Mr.Sep Educational Services

How to Study & Play

Study Mode Guide

1

Select Your Element

Pick any element from the periodic table or use the search bar. You can also explore different ion charges!

2

Follow the Glow

Click the glowing slot to place electrons. The app guides you step-by-step!

3

Master the Rules

Learn Aufbau, Hund's, and Pauli principles through interactive practice. Toggle exceptions for advanced elements!

4

Auto-Play Learning

Enable auto-play to see the correct sequence automatically!

Key Chemistry Concepts

Aufbau Principle

Electrons fill the lowest energy orbitals first, following the diagonal pattern.

Hund's Rule

Fill degenerate orbitals with parallel spins before pairing electrons.

Pauli Exclusion

Each orbital holds max 2 electrons with opposite spins (↑↓).

Exceptions

Some elements like Cr, Cu break the rules for stability!

Game Mode Challenge

1

Start the Challenge

Click "Start Game" to get a random element and begin the timer!

2

Electron Management

Drag electrons from the lobby or click to place them strategically!

3

Score Big Points

Correct placement: +10, Hund single: +5, Pauli pair: +15!

4

Beat the Clock

Complete configurations quickly and accurately to achieve high scores!

Scoring System

Correct Placement +10

Hund Single +5

Pauli Pair +15

Wrong Move -5

Don't show automatically again

🎮 Welcome to Game Mode!

🚀 What You'll Do:

Build electron configurations for random elements as fast and accurately as possible!

🏆 What You'll Achieve:

Speed Mastery - Build configurations quickly
Rule Expert - Master Aufbau, Hund's, and Pauli principles
Element Knowledge - Learn all 118 elements
Problem Solving - Think strategically about electron placement

🎯 Scoring System:

Correct Placement: +10

Hund Single: +5

Pauli Pair: +15

Wrong Move: -5

💡 Pro Tips:

Start with the lowest energy orbitals first
Remember Hund's rule for parallel spins
Watch your streak for bonus points!
Practice makes perfect - try different elements

🎉 Congratulations!

🏆 Element Configuration Complete!

You've successfully built the electron configuration for this element!

📊 Final Score

Total Score: 0

Time: 00:00

Best Streak: 0

🎯 What's Next?

Ready to challenge yourself with another element?

Electron Towers

Current Version: v0.17r0

Stable base + Diagonal Aufbau + Exceptions + Noble-gas shorthand