OCR A level Physics: Chapter 25 Radioactivity is apart of the Module 6: Particle and Medical Physics All presentations come with worked examples, solutions and homeworks. 25.1 Radioactivity 25.2 Nuclear decay equations 25.3 Half-life and Activity 25.4 Radioactive Decay Calculations 25.5 Modelling Radioactive Decay 25.6 Radioactive Dating Types of ionising radiation (alpha, beta-plus/beta-minus, gamma) Penetration power and ionising power Detecting radiation with a Geiger (GM tube) counter Background radiation and correct count rates Electric and magnetic fields affect ionising radiation Cloud chambers Typical speeds of radiation produced form nuclear decays Conservation rules for nuclear decays Nuclear notation Alpha decays Beta-minus and beat-plus decays Gamma decays Decay chains The reason why radioactive decays are considered random and spontaneous Rolling dice being a good analogue for radioactive decays Definition of half-life Determining half-life from a graph. Calculating half-life from a table of data. Activity of a sample in Bq The decay constant derivation Decay constant and half-life Using exponentials to calculate activity and number of nuclei present Solving Differential Equations (beyond A-level Physics course) Iterative Method Selecting appropriate time intervals Comparing answers from the iterative method and exact solution. State what isotopes of carbon are used in carbon dating. Explain how carbon dating works. Calculate the age of objects with carbon dating.