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Physics

Chapter 27: 7-13 Assignment

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Homework

Physics 27: 7-13 The Bohr Atom

Homework

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 PhET to explore the characterstics of the atom.

  • How does light interact with electrons?
  • How does the wavelength of the light affect the energy state of the electron that absorbs it? of the electron that emits it?

Chat Preparation Activities

Chapter Quiz

Lab Work

If you want lab credit for this course, you must complete at least 18 labs; you may complete more if you are preparing for the AP exam.. 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!