Year 9
Atoms, models and radioactivity
Build the particle-level foundation needed for equations, electricity and later periodic trends.
Subtopics
010203
How atomic models changed
Connect electron, proton and neutron discoveries with revisions to the atomic model.
Not attempted8 questionsProtons, electrons and isotopes
Use atomic and mass numbers to determine particle counts and distinguish isotopes from ions.
Not attempted8 questionsRadioactive decay and half-life
Describe nuclear instability, radiation and the statistical pattern of half-life.
Not attempted8 questions