4 (1hr for P5.1.8 relate emissions of alpha particles, Engage: types of radioactive emissions Link to delivery guide: separate and beta particles, or neutrons, and gamma combined) rays to possible changes in the mass or the Explore: card sort for alpha, beta and gamma emissions. Relating the change in mass/ charge etc. Link to SAM charge of the nucleus, or both to the emission produced. P5.1.9 use names and symbols of common Go through an example of how to write balanced equations for the different types of Explain: nuclei and particles to write balanced emission, get pupils to work through a couple of examples together as a class. equations that represent the emission of Extend: pupils should be given plenty of practice in writing decay equations alpha, beta, gamma, and neutron radiations during radioactive decay Evaluate: SAM question J259-04 Question 9 M1b, M1c, M3c P5.1.7 recall that some nuclei are unstable and may emit alpha particles, beta particles, or neutrons, and electromagnetic radiation as gamma rays 5 (1hr for P5.1.10 explain the concept of half-life and Engage: half-life Link to delivery guide: separate and how this is related to the random nature of Explore: Geiger Muller and sources demo count rate. combined) radioactive decay Explain: Simple model of exponential decay M2e A simple experiment involving the tossing of coins which provides an analogy for radioactive decay P5.1.11 calculate the net decline, in order to help users understand the concept of a half-life. expressed as a ratio, in a radioactive emission after a given (integral) number Pupils draw a half-life graph from the above experiment Extend: of half-lives Evaluate: Pupils write instructions on how to work out the half-life of a substance. M1c, M3d
4 (1hr for separate and combined) P5.1.8 relate emissions of alpha particles, beta particles, or neutrons, and gamma rays to possible changes in the mass or the charge of the nucleus, or both P5.1.9 use names and symbols of common nuclei and particles to write balanced equations that represent the emission of alpha, beta, gamma, and neutron radiations during radioactive decay M1b, M1c, M3c P5.1.7 recall that some nuclei are unstable and may emit alpha particles, beta particles, or neutrons, and electromagnetic radiation as gamma rays Engage: types of radioactive emissions Explore: card sort for alpha, beta and gamma emissions. Relating the change in mass/ charge etc. to the emission produced. Explain: Go through an example of how to write balanced equations for the different types of emission, get pupils to work through a couple of examples together as a class. Extend: pupils should be given plenty of practice in writing decay equations Evaluate: SAM question J259-04 Question 9 Link to delivery guide: Link to SAM 5 (1hr for separate and combined) P5.1.10 explain the concept of half-life and how this is related to the random nature of radioactive decay M2e P5.1.11 calculate the net decline, expressed as a ratio, in a radioactive emission after a given (integral) number of half-lives M1c, M3d Engage: half-life Explore: Geiger Muller and sources demo count rate. Explain: Simple model of exponential decay A simple experiment involving the tossing of coins which provides an analogy for radioactive decay in order to help users understand the concept of a half-life. Extend: Pupils draw a half-life graph from the above experiment Evaluate: Pupils write instructions on how to work out the half-life of a substance. Link to delivery guide:
314780-chapter-p5-suggested-teaching-hours-and-outline-scheme-of-work.docx