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How does a smoke detector work?

How does a smoke detector work?. Theme: Stability and Change A review of what we ’ ve learned about the nucleus so far!. Material for a smoke detector:. Americanium-241 Is a decay product of Pu-241 What type of decay would that be? Write a balanced nuclear equation!

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How does a smoke detector work?

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  1. How does a smoke detector work? Theme: Stability and Change A review of what we’ve learned about the nucleus so far!

  2. Material for a smoke detector: • Americanium-241 • Is a decay product of Pu-241 • What type of decay would that be? • Write a balanced nuclear equation! Where does radioactive plutonium come from?

  3. What type of decay does Am-241 undergo? • Alpha and gamma: • Write a balanced nuclear equation: Discuss in terms of conservation of energy and matter!

  4. What do alpha particles do? • Ionize nitrogen and oxygen in air. • This runs a current. • What does smoke do to the current?

  5. How is this technology similar to a photoelectric smoke alarm? • What does the photoelectric effect tell us about light?

  6. What else do smoke alarms need to run a current? Public Service Announcement: What should you do as you turn back your clocks this weekend?!?

  7. What else do I need to know for my test? • Fission vs. Fusion…or both? • Atomic Scientists…what understanding of atomic structure did they give us and how? • How to symbolize atoms, ions, and isotopes • Themes: Structure Meets Function; Stability and Change • What did we learn in this unit to build on our knowledge of these ideas?

  8. Next long block… • We will investigate a radioactive decay curve and connect to the idea of a half life. • What does this graph tell us about carbon-14? • Do all radioactive elements have the same half-life?

  9. Homework Quiz 1) Be able to determine # protons, neutrons, and electrons from a symbol of an ion, and be able to write a symbol given information about the atom/ion. 2) Using your notes, be able to write and balance a specific type of nuclear equation. 3) Given data, determine the average atomic mass of a sample.

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