introduction to nuclear chemistry chapter 19. i. study of nuclear reactions nuclear reactions vs....
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Introduction to Nuclear Chemistry
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?