Topic 6.3- Nuclear Fission 0.0 / 5 ? PhysicsRadioactivityNuclear FissionIGCSEAQA Created by: Alice CullenCreated on: 01-01-17 17:45 What is nuclear fission? Nuclear fission is the splitting of atomic nuclei 1 of 5 What are the two commonly used fissionable substances? Uranium-235 and Plutonium-239 2 of 5 What must happen to the fissionable substance for fission to occur? They must absorb one neutron 3 of 5 What happens to the nuclei in fission? It splits into two smaller nuclei, releasing two or more neutrons and energy 4 of 5 What may these neutrons go on to start? A chain reaction 5 of 5
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