Radioactivity 0.0 / 5 ? PhysicsRadioactivityIGCSEEdexcel Created by: HLeiperCreated on: 16-04-14 10:41 Half-life Time taken for half of the radioactive atoms now present to decay 1 of 8 Compared to isotopes Different for different radioactive isotopes 2 of 8 Background radiation Human activity, Earth, Living things and Space 3 of 8 Measured in Becquerels 4 of 8 Nuclear Fission Splitting of nuclei into 2 daughter particles and 3 neutrons 5 of 8 Chain Reaction neutron collides with another radioactive element 6 of 8 Control Rods Absorb excess neutrons stopping the reaction completely 7 of 8 Moderator Slows neutrons down so they successfully collide with the radioactive element 8 of 8
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