Radioactivity

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  • Radioactivity
    • Structure of an atom
      • Proton
        • RM
          • 1
        • RC
          • +1
      • Neutron
        • RM
          • 1
        • Relative Charge
          • 0
      • Electron
        • Relative Mass
          • Almost 0
        • RC
          • -1
    • The Nucleus causes radioactivity in some materials
      • If the nucleus...
        • Is unstable and can decay
          • By giving out Nuclear radiation
            • is split up
            • In the form of...
              • Alpha particles
                • Two protons and two neutrons – the same as a helium nucleus
                • Very ionising
              • Beta Particles
                • Fast-moving electron
                • Moderately Ionising
              • Gamma rays
                • High energy electromagnetic radiation
                • Weakly Ionising
        • is split up
  • Protons and Neutron are called Sub - Atomic particles because, they are the building blocks of atoms
  • The number of nuclei that decay and give off radiation every second is called the activity of the material
  • Ionising radiation is radiation that has enough energy to cause other atoms to lose electrons and form ions. The different forms of radiation have different levels of ionisation abilities

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