P4 Revision Flashcards Revision-physics/ radiation 0.0 / 5 ? ScienceRadiationPhysicsGCSEAQA Created by: LottieQuarCreated on: 20-11-14 10:24 Radioactive substances decay naturally, what do they give off? Alpha, beta and gamma radiation. 1 of 10 Radioactive decay is a random process so it is not effected by what? Physical conditions such as temperature. 2 of 10 What is the definition of a half-life? The average time that it takes for half of the nucli present to decay. 3 of 10 Which element has the largest stable nucleus? Lead (Pb) 4 of 10 An alpha particle is the same as what? A helium nucleus. 5 of 10 What is a beta particle? A fast-moving electron. 6 of 10 How is a beta particle emitted from a nucleus? A neutron changes into a proton and an electron. 7 of 10 Why is Gamma radiation different from alpha and beta radiation? Because it is an electromagnetic wave. 8 of 10 What radioactive particles can be used in smoke detectors? Alpha particles 9 of 10 What could be used to detect gamma radiation used in an industrial tracer? A Geiger counter. 10 of 10
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