IGCSE Physics - Radioactivity Formulae / key terms 0.0 / 5 ? PhysicsRadioactivityEquations and FormulaeIGCSEEdexcel Created by: Andreas_AntoniouCreated on: 06-05-19 08:44 Atomic Number Atomic Number = number of protons 1 of 10 Mass number Mass number = number of protons and neutrons 2 of 10 Number of protons Number of protons = Atomic Number 3 of 10 Number of Neutrons Number of Neutrons = Mass number - Atomic number 4 of 10 What stops an alpha particle? Paper 5 of 10 What stops a beta particle? Aluminium foil 6 of 10 What stops gamma rays? Lead (Pb) 7 of 10 Alpha Particle Alpha Particle = Helium Particle 8 of 10 Beta Particle Beta Particle = Electron 9 of 10 Gamma Rays Gamma Rays = Just a wave 10 of 10
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