GCSE PHYSICS TOPIC

Atomic structure

Explore atoms, radioactivity, nuclear energy and the science of the stars.

12 chapters

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Work through the 12 chapters in order, or choose a chapter you'd like to revisit.

01 Inside the atom: particles and elements Discover protons, neutrons, electrons and how elements are identified

02 What are isotopes and ions? Explore how atoms differ in neutron number or electrical charge

03 How did scientists discover the nucleus? Follow the experiments that changed our model of the atom

04 What is radioactive decay? Understand unstable nuclei and alpha, beta and gamma radiation

05 How does decay change a nucleus? Explore how radioactive emissions change atomic and mass numbers

06 How do we detect radiation? Discover how radiation is measured and detected

07 What does half-life tell us? Understand radioactive decay rates and half-life graphs

08 How can radiation be hazardous? Explore radiation exposure, contamination and safety

09 How is radiation useful? Discover uses of radioactive sources in everyday life and industry

10 How is radiation used in medicine? Explore medical tracers, PET scans and radiotherapy

11 How does nuclear fission generate electricity? Follow nuclear chain reactions and how power stations work

12 What powers the stars? Discover nuclear fusion and the energy released by stars