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Open the web appPeriodic table of the elements
PSE
The periodic table for everyone — from the curious child to the professional.
A periodic table that grows with you: set the level of detail freely, rotate atoms in true 3D, learn with cards and quizzes, and experiment in the virtual lab.
Who is PSE for?
One app, four depths — every audience sees exactly what it needs.
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Curious child
Colourful elements to explore, simple language, little games. Wonder instead of cramming.
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School student
Exactly the facts for class — with flashcards and quizzes for the next test.
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University student
Properties, trends and isotopes in detail, plus 3D models for understanding instead of memorising.
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Pro & teacher
Exact values with sources and units, the long-form table, and depth down to the last decimal.
Freely adjustable level of detail
From a simple overview to isotopes and exact atomic weights — you decide how deep it goes.
- Simple Name, symbol, colour and a picture. Perfect for first contact.
- Standard Atomic number, atomic weight, group & period, state of matter and typical properties.
- Pro Isotopes, exact atomic weights, all physical-chemical properties — with source and unit.
The depth applies globally or per element — switchable any time, without leaving the app.
- Symbol
- O
- Name
- Oxygen
- Atomic number
- 8
- Atomic weight
- 15.999 u
- Group / period
- 16 / 2
- State
- gas
- Electronegativity
- 3.44 (Pauling)
- Melting point
- −218.79 °C
- Stable isotopes
- ¹⁶O · ¹⁷O · ¹⁸O
Features in detail
Everything a modern periodic table should do — and then some.
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Multiple table views
Compact standard view and the correct long form with lanthanides and actinides in place — one tap away.
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True 3D
Rotatable atom and shell models in real 3D. Understand electron shells by grabbing and turning them.
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Learning & gamification
Flashcards, quizzes and mini-games with streaks and points. Knowledge grows, the fun stays.
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Virtual lab
Experiments and virtual instruments — from a Geiger counter to historic apparatus, with the science history behind them.
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Media for every element
Images, audio and video bring the elements to life — see, hear, understand.
Atom models & orbitals in true 3D
The heart of PSE: go from the plain sphere to the quantum-mechanical electron cloud — freely switchable, rotatable, and computed from the real electron configuration.
Cloud
Colour-true point cloud from real |ψ|² — all occupied orbitals overlaid, colour-coded by type and shell.
Choose a rendering
Tap the switches — the view changes live.
What you can control
- Cloud ↔ Solid Point cloud for honesty, solids for clarity.
- Nodes ↔ Smooth Show or hide the radial nodes.
- Colour coding Hue = orbital type s·p·d·f, brightness = shell n, with legend.
- Single ↔ Overlaid Toggle each orbital with a chip.
- Density slider Set the point count and quality of the cloud freely.
- 2D ↔ 3D Flat preview or full, rotatable 3D with zoom.
- Data-driven From the real configuration — H shows just 1s, iron its 3d/4s.
- Axes & nucleus Co-rotating coordinate cross, exact nucleus at low Z.
From sphere to orbital — seven atom models
Page through the history of the atom. Every model rotates in 3D and is tied to your chosen element — from a historically honest nucleus to full quantum mechanics.
- Democritus
- Dalton
- Thomson
- Rutherford
- Bohr
- Bohr-Sommerfeld
- Orbital (Schrödinger)
Platforms & offline
With you everywhere — and fully usable without internet.
- Windows
- Web
- Android
- iOS & macOS coming later
Offline-first
The whole app works without an account and without internet. Your data stays on the device.
Optional login
Sign in to sync progress, streak and settings securely across your devices.
Get started
Try it right in the browser or download the app.
Download
Native apps for Windows and Android — versions, files and checksums.
Go to downloads