CHAPTER 21 Atomic Physics
Chapter Opener
__ Tapping Prior Knowledge, TE Review previously learned concepts and check for
preconceptions about the chapter content.
SECTION 1 Quantization of Energy
OBJECTIVES
1. Explain how Planck resolved the ultraviolet catastrophe in blackbody
radiation.
2. Calculate energy of quanta using Planck’s equation.
3. Solve problems involving maximum kinetic energy, work function, and
threshold frequency in the photoelectric effect
FOCUS (5 MINUTES)
__ Overview Review the objectives listed in the Student Edition.
MOTIVATE (5 MINUTES)
__ Demonstration, A Blackbody, TE
__ Demonstration, Color of Thermal Sources, TE
TEACH (70 MINUTES)
__ Power Point
__ Sample Set A, Quantum Energy, SE
__ Visual Strategy, Figure 4, TE
__ Demonstration, Photoelectric Effect, TE
__ Sample Set B, The Photoelectric Effect, SE
__ Conceptual Challenge, p. 759, SE
__ Skills Practice Lab, The Photoelectric Effect, SE
__ Datasheet, The Photoelectric Effect
CLOSE (10 MINUTES)
__ Section Review
__ Study Guide, Quantization of Energy
__ Section Quiz
OTHER RESOURCE OPTIONS
__ Problem Workbook, Sample Set A: Quantum Energy
__ Problem Bank, Sample Set A: Quantum Energy
__ Problem Workbook, Sample Set B: The Photoelectric Effect
__ Problem Bank, Sample Set B: The Photoelectric Effect
__ SciLinks, Online Students can visit www.scilinks.org to find internet resources related to
the chapter content. Topic: Max Planck SciLinks Code: HF60923
__ SciLinks, Online Students can visit www.scilinks.org to find internet resources related to
the chapter content. Topic: Photoelectric Effect SciLinks Code: HF61138
SECTION 2 Models of the Atom
OBJECTIVES
1. Explain the strengths and weaknesses of Rutherford’s model of the atom.
2. Recognize that each element has a unique emission and absorption spectrum.
3. Explain atomic spectra using Bohr’s model of the atom.
4. Interpret energy-level diagrams.
FOCUS (5 MINUTES)
__ Overview Review the objectives listed in the Student Edition.
MOTIVATE (5 MINUTES)
__ Demonstration, Particle Scattering, TE
__ Demonstration, Spectral Lines, TE
TEACH (25 MINUTES)
__ Power Point
__ Quick Lab, Atomic Spectra, SE
__ Datasheet, Atomic Spectra
__ Visual Strategy, Figure 13, TE
__ Appendix J: Advanced Topics, Semiconductor Doping, SE This feature allows students
to explore higher-level concepts related to the chapter. (ADVANCED STUDENTS)
__ Conceptual Challenge, p. 767, SE
__ Sample Set C, Interpreting Energy-Level Diagrams, SE This sample and practice
problem set covers energy-level diagrams. (ADVANCED STUDENTS)
CLOSE (10 MINUTES)
__ Section Review, SE
__ Study Guide, Models of the Atom
__ Section Quiz
OTHER RESOURCE OPTIONS
__ Integrating Technology, Seeing Atoms: The STM, Online Students can visit
my.hrw.com and enter the keyword HF6ATMX to find this activity.
__ Problem Workbook, Sample Set C: Interpreting Energy-Level Diagrams
__ Problem Bank, Sample Set C: Interpreting Energy-Level Diagrams
__ SciLinks, Online Students can visit www.scilinks.org to find internet resources related to
the chapter content. Topic: Early Atomic Theory SciLinks Code: HF60442
__ SciLinks, Online Students can visit www.scilinks.org to find internet resources related to
the chapter content. Topic: Modern Atomic Theory SciLinks Code: HF60978
SECTION 3 Quantum Mechanics
OBJECTIVES
1. Recognize the dual nature of light and matter.
2. Calculate the de Broglie wavelength of matter waves.
3. Distinguish between classical ideas of measurement and Heisenberg’s
uncertainty principle.
4. Describe the quantum-mechanical picture of the atom, including the electron
cloud and probability waves.
FOCUS (5 MINUTES)
__ Overview Review the objectives listed in the Student Edition.
MOTIVATE (5 MINUTES)
__ p. 772, TE Present an advanced derivation for students to work through to answer why the
wavelength of a photon is equal to Planck’s constant divided by momentum.
TEACH (25 MINUTES)
__ PowerPoint
__ Appendix J: Advanced Topics, De Broglie Waves, SE This feature allows students to
explore higher-level concepts related to the chapter. (ADVANCED STUDENTS)
__ Sample Set D, De Broglie Waves, SE
__ Classroom Practice, De Broglie Waves, TE
__ Visual Strategy, Figure 18, TE
__ Demonstration, Probability Distribution, TE
CLOSE (10 MINUTES)
__ Section Review
__ Study Guide, Quantum Mechanics
__ Section Quiz
OTHER RESOURCE OPTIONS
__ Problem Workbook, Sample Set D: De Broglie Waves
__ Problem Bank, Sample Set D: De Broglie Waves
END OF CHAPTER REVIEW AND ASSESSMENT
(45 minutes)
__ p. 778, SE This page summarizes the vocabulary terms and key concepts of the chapter.
__ pp. 779–781, SE Students review the chapter material with review questions, conceptual
questions, practice problems, and a mixed review section.
__ Alternative Assessment, p. 781, SE These projects challenge students to apply and
extend concepts that they have learned in the chapter. (ADVANCED STUDENTS)
__ Graphing Calculator Practice, p. 780, SE Students program their graphing calculators to
determine the de Broglie wavelength for a particle given the particle’s mass and speed.
__ Standardized Test Prep, pp. 782–783, SE
__ Appendix D: Equations, p. 864, SE
__ Appendix I: Additional Problems, pp. 895–896, SE
__ Study Guide, Mixed Review
__ Chapter Test A