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Chemistry!!

Chemistry!!. March 7 & 8, 2013 Ms. Boon. 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?

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Chemistry!!

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  1. Chemistry!! March 7 & 8, 2013 Ms. Boon

  2. 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!

  3. 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?

  4. 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.

  5. 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.

  6. 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.

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

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

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

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

  11. 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

  12. 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

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

  14. 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

  15. Practice • Complete the Practice Worksheets. • Raise your hand to check your answers and get a stamp when you are done. • If you finish early: • Do HW due today: 653 #1-4; Work on make up assignments, your study guide, challenge questions, or homework. • Tonight’s HW: • Nuclear Chemistry: Read Ch. 18 Section 2 (p. 648-657). Do problems p. 657 #1, 2, 5, 6 • Benchmark #3 Review - acids and bases: Re-read Ch. 15 Section 1 (p. 530-538) Do problems p. 566 #1, 2, 8, 9, 10; p. 567 #25, 26, 36

  16. 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.

  17. Homework • Nuclear Chemistry: Read Ch. 18 Section 2 (p. 648-657). Do problems p. 657 #1, 2, 5, 6 • Benchmark #3 Review - acids and bases: Re-read Ch. 15 Section 1 (p. 530-538) Do problems p. 566 #1, 2, 8, 9, 10; p. 567 #25, 26, 36

  18. Announcements • Grades: • Pinnacle grades are up to date except for the Reaction rates/Equilibrium worksheets and the short answer portion of the exam. • All make up work is graded and entered in pinnacle • Make up work: • To get your work in before the 10 week grading period, the last day to turn in make up work is Friday March 15. • Tutoring: • Tutoring is Friday at 3:45. • BM 3 study guide: • Bring a folder to our next class to collect your worksheets, old exams, and study guide.

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