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Ch 16

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Ch 16

  1. 1. Nuclear Energy<br />Ch 16<br />
  2. 2. The Atom<br />There are 3 subatomic particles<br /> proton<br /> neutron<br /> electron<br />
  3. 3. Subatomic particles<br />
  4. 4. Atomic Number<br />Atomic number- <br />Each element is different: different<br />number of protons<br />Atomic number- tells number of protons<br />
  5. 5. Mass Number<br />Sum of the<br /> protons<br /> and neutrons<br />Mass<br />Number <br />Is 3 amu<br />
  6. 6. Isotopes<br />Same atomic number, different mass number- what does this mean?<br />H-3<br />H-2<br />
  7. 7. Unstable Isotopes<br />Neutron-proton ratio is unbalanced- to get a more balanced ratio, radioactivity is emitted<br />
  8. 8. 3 Types of Radiation<br />Alpha<br />Beta<br />Gamma<br />
  9. 9. Alpha<br />He nuclei 4 +2<br /> He<br /> 2<br />Weakest, most massive, + charge<br />Stopped by or skin.<br />
  10. 10. Beta<br />Electron ( from nuclei)<br /> beta particle 0<br /> e<br /> -1<br />Light, more penetrating power, stopped by<br />Aluminium foil<br />
  11. 11. Gamma<br />High energy, not a particle, most damaging<br /> can be stopped by several feet of concrete or inches (a foot) of lead.<br />

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