Chapter+24 - Chapter 24 Nuclear Reactions and Their...

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Click to edit Master subtitle style 6/6/11 Chapter 24 Nuclear Reactions and Their Applications 11 Dr. Shamindri M. Arachchige arachsm@vt.edu Davidson 11 Office Hours: Location: Davidson 11 Monday 1:45-5:00 PM Wednesday 1:45-4:15 PM Other hours by appointment
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s 22
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s Isotopes: Z A X Some isotopes are stable. Some isotopes are radioactive (radioisotopes): Some elements have both stable and unstable isotopes: Elements with atomic number 83: Sn: Some elements have NO stable isotopes: Element with atomic number > 83: 33
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s Factors Contributing Isotope Stability 1. Even numbers of protons and/or neutrons Examples: 6 12 C 20 41 Ca 11 23 Na 7 14 N # of protons # of neutrons # of stable isotopes →→→→→→→→→→→→→→→→→→→→→→→→ 2. "Magic Numbers" 44
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s 55
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s Atomic number < 20: Atomic number > 20: Example Problem :For each pair of isotopes listed, predict which one is less stable: (a) 3 6 Li or 3 9 Li (b) 20 48 Ca or 21 48 Sc (c) 83 209 Bi or 96 242 Cm 66
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6/6/11 Chapter 24 Nuclear Reactions and Their Application s Methods of Radioactive Decay A. The isotope is above the band of stability - n/p ratio is too high - too many neutrons for the number of protons 1. Beta emission: Example: 6 14 C 2. Neutron emission: Example: 53 137 I 77
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6/6/11 Chapter 24 Nuclear Reactions and Their Application
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This note was uploaded on 06/06/2011 for the course CHEM 1036 taught by Professor Amateis during the Spring '08 term at Virginia Tech.

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Chapter+24 - Chapter 24 Nuclear Reactions and Their...

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