URL: https://phet.colorado.edu/en/simulation/isotopes-and-atomic-mass
Offline version is available
Simulation Guide: isotopes-and-atomic-mass-html-guide_en
Student Worksheet: PhET Isotopes WS
Are all atoms of an element the same? How can you tell one isotope from another? Use the sim to learn about isotopes and how abundance relates to the average atomic mass of an element.
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