URL: https://phet.colorado.edu/en/simulation/build-an-atom
Offline version is available
Simulation Guide: build-an-atom-html-guide
Student Worksheet: BAA-Student-Handout
Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!
This interactive learning activity is aligned with Solomon Islands Year 10/Form 4 Science Unit 4.1 Atomic Structure and Chemical Reactions
All simulations available at http://phet.colorado.edu are open educational resources available under the Creative Commons Attribution license (CC-BY).
Permission is granted to freely use, share, or redistribute PhET sims under the CC-BY license.
Attribution: PhET Interactive Simulations
University of Colorado Boulder
https://phet.colorado.edu