introduction to nuclear chemistry chapter 19. i. study of nuclear reactions nuclear reactions vs....

Download Introduction to Nuclear Chemistry Chapter 19. I. Study of Nuclear Reactions Nuclear Reactions vs. Chemical Reactions Define “ Chemical Reaction”?

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  • Introduction to Nuclear Chemistry

    Chapter 19

  • I. Study of Nuclear Reactions Nuclear Reactions vs. Chemical ReactionsDefine Chemical Reaction?

  • Define Nuclear ReactionReaction involving spontaneous emission of radiation by an unstable nuclei to a more stable nuclei of a different element.

    Involves changes within nucleus.Atoms of each element do not balance.Spontaneous change of a radioisotope.

  • II. Types of Nuclear Radiation **Responsible for properties of top three!!

  • Example Nuclear Reactions:

  • Rules For Balancing Nuclear Reactions:1.The sum of the mass numbers of the reactants must equal the sum of the mass number of the products. *Total # nucleons remain the same.2.The sum of the atomic numbers of the reactants must equal the sum of the mass number of the products.* Electrical charge remains the same.

  • What kind of radiation is produced in the following nuclear reaction?

  • III. Radioactive Decay Rates Follows First Order KineticsCommonly described by half-life. t1/2The time required for half the radioactive atoms in a sample to undergo decay.

  • Derived From Integrated Rate Law:

  • Examples of Half-Lives

  • Iodine-131 (t1/2 = 8 days)

  • Example Problem: The value of t1/2 for I-131 is 8 days. How many I-131 atoms will remain after 24 days in a sample originally containing 6.4 x 1016 I-131 atoms?

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