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  • radioactivity
    • alpha particles
      • helium nucleus
      • highest strongly ionising
    • beta  particles
      • electron is emitted from the nucleus
      • medium strongly ionising
    • gamma rays
      • electro magnetic radiation
      • least strongly ionising
    • un stable nucleus
    • completly random process
    • half life
      • the time it takes for half of an radioactive element to decay


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