Critical Thinking and Problem SolvingBuild an Atom
Build an Atom
PhET Interactive Simulations · CU Boulder
Use the 'Net Charge' and 'Mass Number' readouts to check your calculations. Online enrichment.
Try this:
Use the 'Net Charge' and 'Mass Number' readouts to check your calculations. Online enrichment.
What the simulation shows
- By the end of the lesson the learner can define atomic number (Z) and mass number (A).
- By the end of the lesson the learner can calculate the number of neutrons in an atom from A and Z.
- By the end of the lesson the learner can write the electron arrangement of the first twenty elements.
Audio narration — reads aloud, works offline
This self-contained HTML5 simulation is bundled inside the delivered package and runs fully offline (no external URLs).