UNIT 1 Atoms, Molecules and Moles:
Introduction:
The reading assignment for this unit is from Chapters 2 and 3. Generally, "Atoms, Molecules and Moles" represents a review of high school chemistry and you should be familiar with these concepts and terms already. Subchapter topics from Chapter 2 are atomic structure, isotopes, atomic and molecular mass and a brief introduction to the periodic table of the elements. Since the periodic table is a principle reference tool for chemistry, you must have some form of it available for use throughout this course. Various formats of the periodic table are available to you. Several examples of the table are printed in the text, an interactive one is on the CD-ROM, Chapter 2, Screen 2-16 or by clicking on the "tool box" icon and one can be found at http:periodic.html
"Subchapter" topics from Chapter 3, include terms which will be used frequently in this course. They are molar mass, empirical formula, molecular formula, cation, anion, polyatomic cation, polyatomic anion, and weight percent composition. Chapter 3 introduces quanitative calculations involving mole to mass conversions, molar mass determination and the relation between empirical and molecular formulas. In order to succeed in your study of chemistry, you must practice enough execises from the assigned problems until you can do them quickly and efficiently.
Reading Assignment:
Chapter 2 Sections 2.2 to 2.7 pages 61-94
Chapter 3 Sections 3.1 to 3.4 and 3.6 to 3.8 pages 102-126 and 132-145
Unit 1 Objectives: After completing Unit 1, you should be able to:
1.In terms of relative charge and mass, compare electrons, protons and neutrons. ( Table 2.1 page 71 and CD- ROM Screens 2. 8,10,11,12 and 13).
2. Define, "isotope" and find isotopic composition, the number of protons and neutrons, given the atomic number and atomic mass or conversely. ( Section 2-4)
3. Using the periodic table, locate the metals and nonmetals, identify the groups - alkali metals, alkaline earths, transition metals, halogens and the noble(inert) gases. (CD-ROM Screen 2.16)
4. Describe the concept of the "mole" and convert mole to mass and mass to mole given appropriate data. (Section 2.7 and CD-ROM Screens 2.18 and 19)
5. Discuss the formation of cations from metals and the formation of anions from nonmetals by losing or gaining electrons respectively. ( See Figure 3.10 and CD-ROM Screen 3.7 )
6. Be able to reproduce the name, formula and charge for the common polyatomic ions listed in Table 3.2, page 118. ( See CD-ROM Screen 3.8 )
7. Given a cation and an anion, write the appropriate formula for the resulting ionic compound. (CD-ROM Screen 3.10)
8. Given the appropriate data, determine the percent composition, empirical formula and/or molecular formula. ( See CD-ROM Screens 3.15,16,17, 18 and 19 )
e-Mail Activity:(10 points)
Send a brief discussion, three to five paragraphs, on ONE of the following topics. Your response is due by Thursday evening by 9:00 p.m. to receive credit for the activity.
a) Write a description of the Rutherford experiment. Include in your discussion when and where the experiment was performed, why the results were not what was expected and how the "plantary model" of the atom could be supported by this experiment.
b) How can you use the relative position of the alkali metals and the halogens in the periodic table to determine the probable charge on the ions formed from these elements. Why is a formula unit of sodium chloride, NaCl, while magnesium chloride is MgCl2 ? Why is carbonate ion, (CO3)2-, considered a "polyatomic anion" ?
c) What is the difference between an empirical and a molecular formula? Use the compound ethane, C2H6, as an example. Is the formula for aspirin,C9H8O4 an empirical formula? What about vitamin C, C6H8O6?
Study Problems: Chapter 2: Exercises: 2.3, 2.4, 2.6, 2.7 and 2.11
Questions: 4,10,13,14 and 16
Problems: 25,27,41 and 43
Chapter 3: Exercises: 3.3, 3.4, 3.5,1&3, 3.6, and 3.11
Questions: 2,6 and 11
Problems: 77, 82, 86, 88, 90, 98 and 109
Workbook Activites: (Note: Should be done in conjunction with the CD-ROM)
Chapter 2: No Specific activity assigned.However you should use the CD to help you study chapter 2 and work the exercises, questions and porblems assigned in that chapter.
Chapter 3: Complete workbook pages: 3-2, 3-4, 3-5, 3-6, 3-7, 3-9, 3-10, 3-11 and 3-12 up to "thinking beyond" in the middle of the page.
FAQ 1 Frequently Asked Questions - Unit 1
Solutions 1 Answers to selected questions and problems from the "Study Problems"
Unit 1 Quiz Available all day Friday, January 16.
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