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Lecture Comments (1)

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Post by Ariana Abramson on April 11 at 11:35:28 AM

great lecture!

Radioactivity, Nuclear Equations, Mass Energy Equivalence

  • Radioactivity discovered by Becquerel, M and P. Curie; developed also by Rutherford and Soddy

  • Nuclear equations must balance in mass and nuclear charges

  • Nuclear reactions involve transmutation of elements – changing one element into another

  • Radioactivity can be used to make new elements, like Pu

  • Loss of mass in nuclear changes leads to production of lots of energy

  • Einstein’s equation: E = mc2

  • Binding energy per nucleon shows stability of nuclei

  • Curve of binding energy; maximum at Fe

  • Both fusion of light elements and fission of heavy elements lead to energy output

Radioactivity, Nuclear Equations, Mass Energy Equivalence

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Radioactivity Pioneers 0:36
    • Becquerel
    • Curie
    • Rutherford
    • Soddy
  • Alpha, Beta, and Gamma Radiation 3:46
    • Three Types of Emission
  • Transmutation and Nuclear Equations 7:01
    • Decay of Uranium
  • Balancing Nuclear Equations 13:08
    • Example: Chromium
    • Example: Radium
  • Synthesis of New Isotopes and Elements 18:47
    • Example: Nitrogen and Alpha Particles
    • Example: Uranium and Carbon Nuclei
  • Mass Changes in Nuclear Transformations 23:55
    • Mass and Energy Equivalence (e=mc2, Einstein)
  • Mass-Energy Transformations 28:35
    • Example: Uranium
  • Stability of Nuclei and Binding Energy 33:11
    • Nucleons
    • Example: Deuterium and Helium
  • Curve of Binding Energy; Fission and Fusion 35:53