CH 221 Chapter Guides

Chapter Guide Three: Overview | Resources | Practice

  Overview of Chapter Guide Three

Chapter 3 introduces the concept of quantum mechanics and how the theories developed, primarily through the use of light and electromagnetic radiation. The four quantum numbers are introduced to describe how electrons are configured in atoms.

Classical physics did not supply an adequate answer for the stability of the atom. A new type of physics was required - quantum physics - which explained the "reality" of the subatomic world. Great names such as Bohr, de Broglie, Planck, Einstein, Heisenberg, Schrodinger, and more will be explored.

Chapter 3 introduces us to a wealth of concepts, and it is important to spend ample time on this chapter learning its contents. We will look at the nomenclature of three main groups of compounds (main group (fixed charge) metal plus nonmetal; transition (variable charge) metal plus nonmetal; and nonmetal plus nonmetal). We will also look at polyatomic ions.

For a complete list of important concepts in Chapter 3, see the Chapter 3 Study Guide.

  Resources for Chapter Guide Three

For this module, you should read Chapter 3 in your textbook.

The following screencasts and Complete Lecturesmight prove useful to you as you study this chapter.

The Chapter Three Lecture notes which accompany this lesson will be helpful when going through this section. These are Web versions of the lecture notes used in the "normal" CH 221 class and should let you see what is important in this chapter. You can also view the Lecture Notes in presentation software: Keynote, PowerPoint

A variety of handouts are available from Chapter Three. Feel free to explore all of them or just the ones which give you difficulty.

Once you have mastered the concepts listed above, check out the Chapter Three Concept Guide for a series of worked problems relating to this chapter. They will help you to ensure the mastery of the knowledge from this chapter.

Finally, test yourself (and get extra-credit in the bargain!) on the following chemistry concepts. If you get 9 out of 10 correct (or some multiple thereof), submit the information to receive extra credit.

  1. Wavelength, Frequency and Energy
  2. Atomic Spectrum of Hydrogen
  3. The de Broglie Wave Equation
  4. Electronic Structures of Atoms and Ions
  5. The Quantum Numbers
  6. Simple Nomenclature - Formulas to Names
  7. Simple Nomenclature - Names to Formulas
  8. Transition Metal Nomenclature
  9. Elements, Moles and Mass
  10. Calculating the Molar Mass of a Compound
  11. Mass, Moles and gfw
  12. Word Problems - Elements and Moles
  13. Chemical Formulas and Mass Relationships
  14. Calculations based on Chemical Formulas
  15. Using Molar Volume
  16. Density, Elements, Mass and Moles
  17. Exercises in Comparison
  18. Further Exercises in Comparison
  19. Additional Exercises in Comparison

  Practice the Concepts of Chapter Guide Three

Complete problem set #3 to further explore the molecule and compound concepts. Problem set #3 covers several questions from Chapter 3, and it can be found here. We will discuss problems like these during recitation, so come prepared to ask and answer questions.

For additional practice, try completing practice problem set #3 (with answers included at the end) and/or the non-assigned problems in Chapter 3. Answers to many of those problems are listed in the back of your textbook.

If you need assistance on these problems, you have several options. You can visit the AVID / Learning Success Center located above the MHCC library on the Mt. Hood Community College campus; they have tutors available to help you with your chemistry homework. You can also contact me if you have any questions.

This sample Quiz #3 (with answers at the end) which was given during a previous year's CH 221 class will help you understand the kind of questions that will be asked on the quiz.

You can also test your mastery of the subject matter by trying the self quiz #2 for Chapter 3 and even self quiz #3 for Chapter 3. These ungraded quizzes can be used to gauge your comfort level with these concepts.

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