Edexcel•GCSE•Physics
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Radioactivity
Atomic structure, radioactive decay, half-life and nuclear energy
Practice 46 subtopics in Radioactivity. All questions match the Edexcel GCSE specification.
About Radioactivity
Radioactivity is a key topic in the Edexcel GCSE Physicsspecification. This topic covers atomic structure, radioactive decay, half-life and nuclear energy.
Master all 46 subtopics below with unlimited AI-generated questions. Each subtopic page includes sample questions and the ability to generate unlimited practice questions with detailed solutions.
All Subtopics (46)
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Atomic structure (protons, neutrons, electrons)Relative masses and charges of subatomic particlesAtomic number (proton number)Mass number (nucleon number)Calculating number of neutronsIsotopes definitionDevelopment of atomic model (Dalton, Thomson, Rutherford, Bohr)Alpha scattering experimentEvidence for nuclear modelRadioactive decay as random processActivity and count rateAlpha radiation (α) propertiesBeta radiation (β) propertiesGamma radiation (γ) propertiesPenetrating power comparisonIonising ability comparisonRange in air comparisonNuclear equations for alpha decayNuclear equations for beta decayChanges in mass number and atomic numberBackground radiation sourcesNatural sources (rocks, radon, cosmic rays, food)Man-made sources (medical, nuclear industry)Half-life definitionMeasuring half-life from graphsHalf-life calculationsActivity after multiple half-livesApplications based on half-lifeRadioactive datingContamination vs irradiationHazards of contaminationHazards of irradiationSafety precautions (lead shielding, distance, time)Medical uses (tracers, radiotherapy)Industrial uses (thickness monitoring, sterilisation)Smoke detectorsNuclear fission definitionFissile materials (uranium-235, plutonium-239)Neutron-induced fissionChain reactionsControlled chain reactions in reactorsNuclear reactors (moderator, control rods)Nuclear fusion definitionConditions for fusionFusion in starsAdvantages and disadvantages of nuclear power
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Start with Atomic structure (protons, neutrons, electrons)