Wish Lesson: The Bohr Model of the Atom

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Wish LessonThe Bohr Model of the Atom

• Edward LaBonne
• labonne_at_comcast.net

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Introduction

• Many properties of the atom can be described
  using the Bohr Model of the Atom, proposed by
  Niels Bohr in 1915. Although not completely
  correct, it is useful to explain such phenomena
  as fireworks.

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Task

• You will work in groups of four consisting of the
  following roles
• 1. Leader keeps group on task and will
  present findings to the class.
• 2. Timer makes sure group is working within
  time frame.
• 3. Recorder records notes for group
  presentation and completes the work sheet.
• 4. Artist draws a picture of the Bohr Model.
• As you explore the Bohr Model web pages define
  1. Photon 2. Quanta
• Answer the following questions
• 1. Why was Bohr's Model considered radical? 2.
  What causes an electron to move away from the
  nucleus and into a higher orbit?
• 3. Why is Bohr's model not completely accurate?
  
• 4. What happens to the energy of an electron
  when it absorbs a photon?
• Click-on the terms and questions to take you to
  a web page!
• The leader is responsible for defining the
  terms. The timer is responsible for questions 1
  and 2. The recorder is responsible for questions
  3 and 4. The artists picture should depict an
  electron jumping energy levels in a Bohr Atom.

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Process

• The class is divided into teams of four. Each
  team will define the terms, answer the four
  questions, and draw a picture of the Bohr atom.
  The teams will present their findings to the
  class. The presentation should include the terms
  photon and quanta while showing what happens to
  an electron when it jumps energy levels in their
  picture of the Bohr Atom. Each team will hand in
  their completed work sheet and picture by the end
  of day one. Presentations will be on day two.

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Conclusion

• Each team will present their drawing with a
  discussion of terms and questions in a 2 to 5
  minute presentation. Although the group leader
  will lead the presentation, each team member will
  discuss the portion of the task for which he/she
  is responsible.

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Resources

• http//csep10.phys.utk.edu/astr162/lect/light/bohr
  .html
• http//www.colorado.edu/physics/2000/quantumzone/i
  ndex.html
• http//wine1.sb.fsu.edu/chm1045/notes/Struct/Bohr/
  Struct03.htm

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Evaluation Rubric

• Web Quest 1. On Task. All group members
  involved in 0 10 assigned roles.
• 2. Completion of assigned terms,
  questions 0 10
• and picture.
• 3. Presentation contains
  understanding of an 0 10
• electron undergoing quantum leaps in order
• to emit or absorb a photon.