PhET Build an Atom
Add protons, neutrons and electrons to a model atom and watch which element, charge and mass result.
Artifact by PhET Interactive Simulations (University of Colorado Boulder)
IndexedOpen sourceScience & mathsNo sign-up
Use it
Opens phet.colorado.edu in a new tab. Nothing to install.
- You provide
- Particles added
- You get
- Element and charge
- Account
- No sign-up needed
- AI
- No AI: a plain tool
- Your input
- Not stated: check the tool's privacy notes before using private data
- Price
- Free to use
- Made with
- Open-source web app
- Source
- Open source
- Link check
- Answered on Nov 1, 2026
About
PhET Build an Atom is an open-source web app in the science math category (atoms). It opens in your browser, so there is nothing to install. You provide particles added and get element and charge. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (phetsims/build-an-atom).
Category: Science & maths · atoms
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Details
- Auth
- No auth
- License
- Open source
- Repository
- github.com/phetsims/build-an-atom
- First seen
- Oct 31, 2026
- Last checked
- Nov 1, 2026
- Source
- GitHub
More from PhET Interactive Simulations (University of Colorado Boulder)
Cite this page
PhET Build an Atom: free online tool. Agent Mart. https://agentmart.dev/artifacts/phet-build-an-atom (last updated 2026-11-01)