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Ch 16
 

Ch 16

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    Ch 16 Ch 16 Presentation Transcript

    • Nuclear Energy
      Ch 16
    • The Atom
      There are 3 subatomic particles
      proton
      neutron
      electron
    • Subatomic particles
    • Atomic Number
      Atomic number-
      Each element is different: different
      number of protons
      Atomic number- tells number of protons
    • Mass Number
      Sum of the
      protons
      and neutrons
      Mass
      Number
      Is 3 amu
    • Isotopes
      Same atomic number, different mass number- what does this mean?
      H-3
      H-2
    • Unstable Isotopes
      Neutron-proton ratio is unbalanced- to get a more balanced ratio, radioactivity is emitted
    • 3 Types of Radiation
      Alpha
      Beta
      Gamma
    • Alpha
      He nuclei 4 +2
      He
      2
      Weakest, most massive, + charge
      Stopped by or skin.
    • Beta
      Electron ( from nuclei)
      beta particle 0
      e
      -1
      Light, more penetrating power, stopped by
      Aluminium foil
    • Gamma
      High energy, not a particle, most damaging
      can be stopped by several feet of concrete or inches (a foot) of lead.