10/8 What is a nuclear reaction?

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10/8 What is a nuclear reaction?

  1. 1. Launch:10/8   Place last night’s homework on your desk   Answer the following question: 1.  Write out the balanced equation for the alpha decay of Polonium-214.
  2. 2. 4.  Which of the following correctly represents the alpha decay of Polonium-214?
  3. 3. Unit #3: Nuclear Processes
  4. 4. What is a nuclear reaction? Mr. Heffner 10/8/09
  5. 5. What is a nuclear reaction?   Three types: 1.  Radioactive decay 2.  Fission 3.  Fusion
  6. 6. What is a nuclear reaction?   Three types: 1.  Radioactive decay 2.  Fission 3.  Fusion
  7. 7. 1.What is radioactive decay?   When an unstable isotope emits a particle and transforms into a more stable isotope. Parent Isotope Daughter Product (Unstable) (Stable) α, β, or γ particle
  8. 8. What is a nuclear reaction?   Three types: 1.  Radioactive decay 2.  Fission 3.  Fusion
  9. 9. 2. What is fission?   In fission…   an unstable heavy nucleus splits apart to form two (or more) lighter nuclei
  10. 10. 2. What is fission?   Fission is a chain reaction
  11. 11. 2. What is fission?   Examples of fission:   Atomic bomb
  12. 12. 2. What is fission?   Examples of fission   Nuclear energy
  13. 13. What is a nuclear reaction?   Three types: 1.  Radioactive decay 2.  Fission 3.  Fusion
  14. 14. 3. What is fusion?   In fusion…   two nuclei come together and merge (or fuse) to form a heavier nucleus
  15. 15. 3. What is fusion?   Examples of fusion   The sun
  16. 16. 3. What is fusion?   Examples of fusion   Fusion reactor
  17. 17. What makes nuclear reactions so powerful?   Nuclear reactions are… 1,000,000 (one million) …times more powerful than chemical reactions.
  18. 18. What makes nuclear reactions so powerful?   Albert Einstein   E=mc2   E = energy   m = mass   c = speed of light   3 X 108 m/s   A small amount of mass is converted into energy
  19. 19. What is a nuclear reaction?   Three types: 1.  Radioactive decay 2.  Fission 3.  Fusion
  20. 20. Mind Map   In the center, write “Nuclear Reactions”   In the next three ovals, write the 3 types of nuclear reactions   Radioactive Decay   Fill in the boxes with a short definition, a small picture, and a list of examples   Definition: Unstable isotopes emit particle  stable   Examples: Radiation therapy
  21. 21. Practice Questions 1.  What is fission? 2.  How is fission different from fusion? 3.  What is something that fission and fusion have in common? 4.  What are two ways that nuclear reactions help us? What are two ways that nuclear reactions hurt us? 5.  How do nuclear reactions compare to chemical reactions? 6.  Why are nuclear reactions so powerful? What is the equation and who discovered it?
  22. 22. Exit Slip 1.  Which of the following correctly identifies the three types of nuclear reactions? a.  fission and fusion b.  fusion, fission, and isotope emission c.  fission, fusion, and radioactive decay d.  fusion, alpha particle, and fission
  23. 23. Exit Slip 2.  The process by which a heavy nucleus splits apart to form two lighter nuclei is called a.  neutron absorption. b.  fusion. c.  beta decay. d.  fission.
  24. 24. Exit Slip 3.  The picture above is an example of a.  fusion. b.  radioactive decay. c.  fission. d.  none of the above.
  25. 25. Exit Slip 4.  Nuclear reactions are a.  only destructive and do not contribute towards human development. b.  one million times more powerful than chemical reactions. c.  not involved with changes to the nucleus of an atom. d.  dependant on the number of valence electrons in an isotope.
  26. 26. Exit Slip 5.  Why are nuclear reactions so powerful? a.  because a small amount of mass is converted into energy b.  because the speed of light is a really small number c.  because electrons have a strong repulsive force d.  because isotopes are usually more stable than other atoms of the same element
  27. 27. Homework   Pg. 874 #11, 15, 17   Pg. 669 #6, 8, 11, 12, 19   Study for tomorrow’s quiz using exit slips!   lpschem.wordpress.com

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