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Day 6:

Day 6:. NUCLIDE QUIZ Radioactivity – Ch. 18 Section 2 Practice ! Alpha and beta radiation worksheet Test Pt. 1 = Friday. Radioactivity (or radioactive decay). The process by which an unstable nucleus emits one or more particles or energy in the form of electromagnetic radiation

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Day 6:

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  1. Day 6: • NUCLIDE QUIZ • Radioactivity – Ch. 18 Section 2 • Practice! • Alpha and beta radiation worksheet • Test Pt. 1 = Friday

  2. Radioactivity (or radioactive decay) • The process by which an unstable nucleus emits one or more particles or energy in the form of electromagnetic radiation • Radiation: When particles are emitted from an unstable nucleus • break down and release energy

  3. The result… • A change in the identity of the atom – it becomes another element

  4. Radioactive Isotope • An isotope of an element that has an unstable nucleus and is radioactive • Exist for many elements on the periodic table • Example: • Carbon-14

  5. 3 Types of Radioactivity • Three types of Radioactivity • Alpha () – high energy helium nucleus • Beta (β) – high energy electron • Gamma (γ) – high energy electromagnetic radiation

  6. Alpha Particle - • Large particle emitted from the nucleus • High energy helium nucleus Particle: • Can be stopped by skin or a sheet of paper

  7. Alpha Emission alpha particle radioactive isotope neutron proton Timberlake, Chemistry 7th Edition, page 87

  8. Alpha Decay • Radioactive decay that occurs when a radioisotope emits an alpha particle • Balanced Equation:

  9. Alpha Decay Practice • Write a balanced equation for the alpha decay of Uranium-233. • Answer:

  10. Beta Particle - • High energy electron-like particle emitted b a neutron in the nucleus. The neutron then changes into a proton. • Particle: • Can be stopped by a few sheets of aluminum foil, heavy clothing, or wood

  11. Beta Emission Timberlake, Chemistry 7th Edition, page 90

  12. Beta Decay • Radioactive decay that occurs when a radioisotope emits a beta particle • Balanced Equation:

  13. Beta Decay Practice • Write a balanced equation for the beta decay of Copper-66. • Answer:

  14. Gamma Ray - γ • The high-energy photon emitted by a nucleus during fission and radioactive decay • Can be produced during several different types of radioactive decay • Pass through most substances with ease • Can be stopped by thick walls of concrete or lead

  15. Absorption of Radiation Timberlake, Chemistry 7th Edition, page 84

  16. Fission vs. Fusion • Both turn matter into Energy, but in different ways… Fission vs. Fusion

  17. Nuclear Fission (to come apart) • The splitting of the nucleus of a large atom into two or more fragments, a process that produces additional neutrons and a lot of energy

  18. Nuclear Fusion (to come together) • The combination of the nuclei of small atoms to form a larger nucleus, a process that releases energy

  19.  Practice  • Practice writing balanced equations for nuclear reactions with the Nuclear Reactions worksheet.

  20. Day 7 • Finish Radioactivity & Nuclear Reactions • Revision sheet! • Ch.3 Part 1: TEST TOMORROW!!

  21. Ch.3: Part 1 Test! • Atomic Theory • History of the Atom • Structure of the Atom • Nuclides • Radioactivity & Nuclear Energy

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