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Nuclear 1

Nuclear 1. April 21-22, 2014 Ms. Boon. Objective: I can define radioactivity and identify the parts of an atom involved. I can write nuclear reaction equations. Agenda: Catalyst Video Nuclear Submarines Notes: Radioactive decay Article Review: Nuclear power plants. Catalyst.

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Nuclear 1

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  1. Nuclear 1 April 21-22, 2014 Ms. Boon

  2. Objective: I can define radioactivity and identify the parts of an atom involved. I can write nuclear reaction equations. • Agenda: • Catalyst • Video Nuclear Submarines • Notes: Radioactive decay • Article Review: Nuclear power plants Catalyst • Pick up a handout • Discuss: What do you think of when you hear the word “radioactive”?

  3. Objective: I can write a nuclear reaction equation. • Agenda: • Catalyst • Nuclear Subs • Nuclear reaction equations • Exit Slip: Nuclear Chem. Catalyst • What are the three types of radiation? • Nuclear power plants use (fusion/fission) to generate energy and the sun uses (fusion/fission) to generate energy. • Take out your HW!

  4. Video: movies file – nuclear submarine Spotlight: Nuclear Submarine Video Focus Questions: • What is the mission of the US nuclear submarines? • What type of nuclear reaction powers the sub? How does this work? • Why does the Navy use nuclear subs rather than diesel fuel powered subs?

  5. Think, Pair, Share: Q: Which do you think produces more energy per gram of starting materials? (a) nuclear fission (b) combustion of fossil fuels Can you defend your decision to your partner?

  6. Notes: The nuclear strong force • The nuclear strong force holds protons and neutrons in stable nuclei together. • This force is stronger than chemical bonds. • Breaking or changing the nuclei during fission or fusion reactions releases some of the nuclear strong force energy. • Example: fission of 1 g of uranium-235 generates as much energy as the combustion of 2700 kg of coal.

  7. Notes: The nuclear strong force • Example: fission of 1 g of uranium-235 generates as much energy as the combustion of 2700 kg of coal.

  8. How much energy? • The energy released in a nuclear reaction is calculated using E=mc2 C is the speed of light 3.00 x 108 m/s Eis energy (J) m is mass (kg) Using this equation, converting 1.0 g of a substance into energy produces over 1010 KJ of heat energy.

  9. Quick Check: • Which takes the most energy to occur: • physical, • chemical or • nuclear change

  10. Quick Check: • What part of the atom is involved in nuclear reactions? • The nucleus • The electron cloud

  11. How To Write a Nuclide Symbol: Mass number = protons + neutrons Think, Pair, Share: How many neutrons does this nuclide have?

  12. How To Write a Nuclide Symbol: Compare the nuclide symbol to the periodic table symbol. Practice: Complete “B” Practice Writing Nuclides on your worksheet.

  13. Radioactive decay equations: 1. Alpha (α) decay: The mass number decreases by 4 and the atomic number decreases by 2. 218 4 Po He + 84 2 214 Pb 82

  14. Radioactive decay equations: 2. Beta (β) decay: The mass number remains the same. The atomic number increases by 1. 14 0 C e + 6 -1 14 N 7

  15. Radioactive decay equations: 3. Gamma (γ): Gamma rays are released during electron capture. 51 0 Cr + e + γ 24 -1 51 V 23

  16. Practice • Complete the Practice Worksheets. Use chapter 18 to help. • Raise your hand to check your answers and get a stamp when you are done. • If you finish early: • Do HW pp. 653 #1-4 • Nuclear Chemistry: Read Ch. 18 Section 2 (p. 648-657). Do problems p. 657 #1, 2, 5, 6

  17. Exit Slip: Nuclear Chemistry What part of an atom is involved in nuclear reactions? What are the three types of radioactive particles/waves? What is the difference between fission and fusion? Which produces more energy per gram of fuel: a nuclear reaction or a combustion (chemical) reaction? Write the nuclear equation for the alpha decay of uranium-238.

  18. Homework Read p. 642-643, 648-653 practice p. 653 #1-4 Nuclear Chemistry: Read Ch. 18 Section 2 (p. 648-657). Do problems p. 657 #1, 2, 5, 6 Read Ch 18 Section 3: p. 666 #4, 9, 10, p. 669 #25, 26, 27

  19. Video: http://www.youtube.com/watch?v=TJgc28csgV0&list=PLJicmE8fK0EjGmPGeh_WDu69qAsN-iHVA Radioactivity: Expect the Unexpected Video Focus Questions: • What is radioactivity? • What are the three types of radioactive particles described in the video and how are they different? • What are some uses of radioactive particles described in the video?

  20. Article Review: Nuclear Energy

  21. Quick Check: • What are the three types of radiation? • Nuclear power plants use (fusion/fission) to generate energy and the sun uses (fusion/fission) to generate energy.

  22. Homework Review • Read p. 642-643, 648-653 practice p. 653 #1-4 218 4 Po He + 84 2 214 Pb 82 142 142 Pm + Nd 61 60 0 e -1 253 4 1 Es + He n + 99 2 0 256 Md 101 22 0 Na + e 11 -1 22 Ne 10

  23. Video: movies file – mouse trap reactor regular and slow motion Model: Mouse Trap Reactor Video Focus Questions: • In what ways does the mouse trap reactor model simulate a nuclear chain reaction? • How is an actual nuclear chain reaction different from the mouse trap model?

  24. Los Angeles 2020 Energy Proposal Project • Let’s review the assignment together. • To get started – complete the activity in the box at the bottom of the first page.

  25. Nuclear Energy Research • http://blnds.co/1nBsMBr • Beginning with the resources posted on this blendspace, gather information both for and against the use of nuclear energy as part of your energy proposal.

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