Radioactive decay

These are my notes from the end of topic test

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  • Radioactive Decay
    • Sub atomic particles
      • electron is negatively
        • mas = 1/2000
      • proton is positive
        • Untitled
      • neutron has no charge
        • mass = 1
    • Isotopes are atoms of the same element. They have the same number of protons and electrons, but a different number of nuetrons
    • Alpha, Beta and Gamma
      • Alpha
        • Least penetrating and least dangerous outside of body but most dangerous inside of body
        • Shortest range of radiation and is affected by a magnetic field
      • Beta
        • is affected by a magnetic field
      • Gamma
        • Most penetrating and most  dangerous outside of body but least dangerous inside
        • Used as a cancer treatment
        • Longest range of radiation and is not affected by a magnetic field
    • Half-life
      • The radioactivity of a source decreases with time the nuclei are unstable and decay
      • Half-life is a measure of how long it takes for the radioactive substance to decrease by half
    • Nuclear fission/fusion
      • fission = split
        • A neutron is absorbed by a uranium nucleus, making it unstable. The uranium isotope then splits off into a barium,krypton, 3 neutrons and energy
      • fusion = joined

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