Download Unit 3

Winter ‘10
Chemistry 105
Unit 3
2/24 Outcomes:
1. To relate, after examining issues, conflicts between the need for reducing carbon emissions and the
concerns over nuclear power.
2. To review the structure of the nucleus, isotope symbols, and to describe what “missing mass” means.
3. To know that some nuclei are unstable, and may spontaneously decompose, or may be bombarded
and caused to decompose, liberating energy.
4. To describe the events of a chain reaction in which more neutrons are produced than consumed.
5. To describe the principal construction details of a nuclear power plant, including how the reaction is
controlled, how energy is obtained, and what components are radioactive.
6. To have a general overview of where nuclear power is prevalent on a global scale.
7. To describe and give symbols for three fundamental types of radioactivity emissions.
8. To use these symbols with isotope formulas in nuclear equations to communicate nuclear changes.
9. To know in which type of decay processes atomic numbers increase and decrease.
10. To describe and contrast the nuclear accidents that occurred at Three Mile Island and Chernobyl, and
the outcomes of each.
Assignments:
Read §7.1 – 7.6. (Reading Quiz from 7.1 – 7.6)
Recommended exercises: From the above sections, all in-chapter “Your Turn” exercises, and chapterend problems selected from #1-20, 24 – 33.
Current Issues Abstracts (Chapters 4, 5, 6) due.
Presentation topics due.
2/26 Outcomes:
1. To interpret the term “ionizing radiation” and why it may be damaging to tissue, or possibly
beneficial in treating cancers.
2. To describe sources and hazards of Radon, and why it poses a unique type of hazard in homes.
3. To use the curie, the rad, and the rem to describe different measures of radiation exposure; to
recognize the roentgen and the sievert as other measures.
4. To assess and interpret values of radiation exposure from typical sources in our lives.
5. To know the particular organs associated with iodine and strontium isotope hazards.
6. To use and interpret the phenomenon of half-life of the intensity of radiation from sources.
7. To use half-life to project future levels and times, and apply the concepts to radioactive waste.
8. To describe some of the methods used to deal with, and controversies surrounding radioactive waste,
including the reprocessing of plutonium.
9. To know why, and how uranium is enriched before using in nuclear power or weapons.
10. To describe most of the risks and benefits of coal vs. nuclear energy production.
Assignments:
Read §7.7 – 7.12 (Reading Quiz from 77. – 7.8)
Recommended exercises: From the above sections, all in-chapter “Your Turn” exercises, and chapterend problems selected from #21-23, 34 – 43.
Presentation rough outline due.
3/3 Outcomes:
1. To gain and communicate a perspective on the extent that petroleum-based polymers (plastics) have
replaced traditional materials (including natural polymers) in our society and technology.
2. To explain the difference between the size and the reactivity of monomers and polymers.
3. To know the differences in the structure and bonding of ethylene and polyethylene and to describe
how the addition polymerization reaction takes place.
4. To describe the differences between high-density and low-density polyethylene and identify them by
their recycling number.
5. To use a symbolic representation of the repeating structural unit of polymers.
6. To know the term “plasticizer” represents a different material on a plastic used to give to flexibility.
7. To know the names of the six plastic types represented by recyclable numbers 1 – 6 and describe the
key functional groups distinguishing numbers 2 – 6.
8. To know the difference in manufacture of polystyrene and “Styrofoam.”
9. To describe the structural differences in the polymer chain of condensation polymers vs. addition
polymers. Given a repeating unit, to identify polyesters from the ester functional group.
10. To identify the repeating group in proteins including the peptide bond.
11. To prepare for presentations on 3/10 and 3/12.
Assignments:
Read §9.1 – 9.5 (Reading Quiz from 9.2 – 9.4.)
Recommended exercises: From the above sections, all in-chapter “Your Turn” exercises, and chapterend problems selected from #1-22.
Graded Homework, Chapter 7, #11, 14, 19, 21, 30, 31, 43, 49
3/5 Outcomes:
1. Given a repeating unit, to identify polyamides from the amide functional group.
2. To identify the repeating group in proteins including the peptide bond.
3. To describe, qualitatively, the amount of materials we recycle as a society.
4. To describe, qualitatively, the amounts of recyclable plastics of each type that we recycle.
5. To describe the molecular design of “biodegradable” plastics.
6. To describe the process, and the end uses, of recycling PET.
7. To describe proteins as polyamides from amino acid monomers.
8. To recognize polar and non-polar groups among the side-chains of amino acids and proteins, and to
predict their interactions with each other and with water.
9. To prepare for presentations on 3/10 and 3/12.
Assignments:
Read §9.6 – 9.8 (Reading Quiz from 9.7, 9.8.); 11.4
Recommended exercises: From the above sections, all in-chapter “Your Turn” exercises, and chapterend (chapter 9) problems selected from #23 – 45.
Presentation Detailed Outline (with references) due; Learning Outcomes and two questions due.
3/10, 3/12 Presentations (see last page)
Participation in assessment of each presentation required for full credit.
3/10 Chapter 9 homework due: #5, 14, 16 (list), 20, 29, 47.
3/12 Group Sheet 3
3/17 Outcomes:
1. To describe the general backbone structure of DNA.
2. To name the four “pendant bases” and describe the interactions between polymer chains that lead to
the double helix.
3. To describe the process of replication of DNA and how complimentary bases end up producing a
reliable copy of the original.
4. To describe how a three-base sequence, called a codon, ultimately specifies what amino acid will be
placed in sequence in a protein.
5. To use the terms, primary, secondary, tertiary to relate different regions of protein structure.
6. To view the functions of proteins as catalysts, transport agents, and as structural components.
7. To describe what an active site in a protein is, and how the shape and polarity can control what type
of substrate can be bound at the active site.
8. To describe how a change in DNA (a mutation) would result in a differently-functioning protein.
Assignments:
Read §12.1 – 12.4 (Reading Quiz from 12.2 – 12.4 .)
Recommended exercises: From the above sections, all in-chapter “Your Turn” exercises, and chapterend problems selected from #1 – 18.
3/19 Outcomes:
Success on an hour exam! Content from all the above learning outcomes.
Graded Homework, Chapter 12, #7, 10, 16, 37; Use another source to look up the term RNA, and
use a few sentences to describe its role between DNA and protein synthesis.
Group Sheet 4
Current Issues Abstracts due 3/19.
Assignments and Due Dates for Presentations
Rough outline:
3 points
A simple, brief listing of subtopics in outline form.
Detailed outline:
4 points
Includes an outline from which your instructor could asses
content, and references
Outcomes and Assessment: 3 points
Two or three Outcomes you expect the class to learn, and 2
assessment questions (and answers) that the class must
answer on Group Sheet 3.
Presentation:
30 points
Instructor: 15 points on content only.
Peers: 15 points on effectiveness and learning value.
Your individual score will be the total of 40 points multiplied by your contribution factor:
Each group member will submit a confidential assessment of the percent of the total effort
contributed by each group member.
Group Sheet 3:
10 points
Questions to be answered on a group sheet during the
presentations.
The following is a timeline for the deadlines, which are reflected above in the Unit 3 Syllabus:
Feb 17: Groups / topics may be chosen.
Feb 24: Topic submitted; I may suggest
possible topic revisions.
Mar 3: Make progress!
Mar 10: Presentations (part of class)
% Contribution forms due from presenters
Start Group Sheet 3
Feb 19: Timeline distributed.
Feb 26: Rough Outline due
Mar 5: Detailed Outline due.
Deadline for unconventional formats or special
media requests.
Outcomes and Assessment Questions due.
Schedule posted.
Mar 12: Presentations (part of class)
% Contribution forms due from presenters
Complete and submit Group Sheet 3