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This slideshow covers different aspects of radioactivity, including: the structure of an atom, isotopes, types of radioactivity, changes in proton number and mass number after decay, ionisation, Geiger-Muller tubes, blocking radiation using paper, foil and lead, deflection of radiation by magnetic fields, background radiation, uses of radioactivity, tracers, radiotherapy, protecting the Earth from radioactivity, dangers of radioactivity, half life, decay curves, dating materials using half life, energy-mass equivalence, nuclear fission, nuclear power stations, handling radioactive materials, disposing of radioactive waste, nuclear fusion.

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