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Physics Honors/AP 1 and 2

Chapter 27: 7-13 Assignment

Course Materials are always under revision! Weblecture content may change anytime prior to two weeks before scheduled chat session for content.

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Physics 27: 7-13 The Bohr Atom


Reading Preparation

Text Reading: Giancoli, Physics - Principles with Applications, Chapter 27: Sections 7 to 13

Study Points

Key Equations

De Broglie Wavelength λ =   h p Objects with momentum m will have an associated wavelength of λ.
Rydberg Constant Equation 1 λ   =   R   ( 1 n 2 2     1 n 1 2     ) The wavelength of light emitted when an electron changes orbitals is a function of the energy levels of the initial and final orbital.
Orbital radius r n   =   n 2 Z (   0.529     10 10   m ) The radius of the nth orbital of an atom with atomic number Z (i.e., Z protons) is rn.
Energy of an electron E n   =   2 π 2 Z 2 e 4 m k 2 h 2 1 n 2   Joules   =   13.6   Z 2 n 2   eV   This gives the energy of an electron in energy level n of an atom with Z protons.

Web Lecture

Read the following weblecture before chat: The Bohr Atom

Study Activity

Use the Bohr Model Simulator at the McGraw-Hill education site.

  • Read the Introduction and How To tabs so that you understand the theory of the Bohr atom and the operation of the simulator.
  • Carry out the exercises on the exercise tab and check your solutions.

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 12 labs (honors course) or 18 labs (AP students). One or more lab exercises are posted for each chapter as part of the homework assignment. We will be reviewing lab work at regular intervals, so do not get behind!