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Edexcel IGCSE Physics Topic 7 - Radioactivity And Particles 




Below is everything the examiners think you know, if you're not sure of something click on the link to watch my YouTube video explanation. For a copy of these you can print off, get the FREE revision guide I wrote for you. 


  I can recall the structure of an atom

 • I can recall the parts of an atom

 • I can recall the mass, charge and location of the subatomic particles

 • I can recall the electrons are arranged in energy levels (shells)

 • I can define the terms atomic number and mass number

 • I can work out the number of protons, electrons and neutrons an atom has

 • I can explain why atoms have no overall charge

 • I can explain why ions have a charge

 • I can use and define the word isotope

 • I can work out the number of protons, electrons and neutrons and isotope has

 • I can describe the different types of radiation

 • I can recall that alpha and beta particles and gamma waves are ionising

 • I can recall that alpha and beta particles and gamma waves are made when unstable atoms decay

 • I can fully describe alpha and beta particles and gamma waves in terms of ionisation and penetrating power

 • I can describe practical investigations into the penetrating powers of alpha, beta and gamma

 • I can represent radioactive decay by nuclear equations Video 1 Video 2 

 • I can balance nuclear equations

 • I can describe what a Geiger-Muller tubes does

 • I can define the term half-life

 • I can relate half-life to radioactive decay

 • I can determine half-life from graphic or mathematical information

 • I can recall the different sources of background radiation

 • I can recall that radioactivity declines over time and is measured in becquerels

 • I can contrast contamination and irradiation

 • I can describe the dangers of ionising radiations

 • I can describe the different uses of radioactivity

 • I can describe nuclear fission

 • I can describe the chain reaction that can occur from nuclear fission

 • I can describe nuclear fusion

 • I can describe nuclear reactions, including fission, fusion and radioactive decay, as a source of energy

 • I can describe how the nucleus of U-235 can be split during fission

 • I can describe the products of the fission of U-235

 • I can describe nuclear chain reactions of U-235

 • I can describe what the moderator and control rods do in nuclear reactors

 • I can explain the purpose of shielding around a nuclear reactor

 • I can contrast nuclear fusion and nuclear fission

 • I can define nuclear fusion

 • I can describe fusion and the process occurring in stars to create their light

 • I can explain why nuclear fusion does not happen at low temperatures and pressures