I. Study of Nuclear Reactions Nuclear Reactions vs. Chemical Reactions Define “ Chemical Reaction”?
Define “Nuclear Reaction” Reaction 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!!
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 Kinetics Commonly described by “half-life”. t1/2 “The time required for half the radioactive atoms in a sample to undergo decay.”
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?