GCSE Additional Science - Physics

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GCSE Additional Science - Nuclear Physics 

  • Atoms are made up of protons, neutrons and electrons. 
  • There are protons and neutrons in the nucleus and there are electrons in the outer shells which are also called 'energy levels'. 
  • The atomic number is the proton number. 
  • The mass number is the nucleon number. 
  • An isotope has the same number of protons and different numbers of neutrons. 

Ionising radiation: 

  • An alpha particle is equivalent to a helium nucleus which is made up of

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