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For more information, please see full course syllabus of Chemistry
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Lecture Comments (3)

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Post by Christian Benz on April 4, 2014

~15:00 in the denominator it isn´t  U^206 but Pb^206.

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Post by Maimouna Louche on July 31, 2012

Thanks Professor!

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Post by Terri Nostrand on March 24, 2011

There is an error on the lecture notes at 35:15. The atomic number (number of protons) should not have changed. Uranium will always be 92, otherwise it will be Americium.

Radioactive Decay, Half-Life, Nuclear Reactions

  • All radioactive decays are first order in # of radioactive nuclei

  • Half-life: t at which half original nuclei have decayed; t1/2 = 0.693/k

  • Use half-lives and k to date organic archaeological samples and rocks

  • Nuclear fusion generates the energy of the stars including the sun

  • Nuclear reactions are used to generate power in nuclear power plants; and in nuclear weapons as used in WWII

  • Nuclear power plants – major concern is storage or disposal of nuclear wastes

Radioactive Decay, Half-Life, Nuclear Reactions

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
  • First Order Nuclear Decay 0:41
    • Example: Uranium
    • Rate Constant
    • Integrated Rate Equation
    • Half-Life
  • Half-Lives and Rate Constants 6:09
    • Examples: Various
  • Radioactive Dating: Rocks 9:18
    • Example: Rock with Uranium and Lead
  • Radioactive Dating: Carbon-14 17:27
    • Example: Shroud of Turin
    • Example: Wooden Staff
  • Nuclear Fusion in Stars 27:22
    • Example: Reaction in Sun
  • Nuclear Weapons 32:24
    • Example: Uranium Isotope
  • Nuclear Power 38:52
    • Nuclear Power Usage
  • Nuclear Wastes and Their Disposal 45:03
  • Additional Example 1