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Chemistry 102A

Chemistry 102A. Dr. Christine Yerkes 207 Chem Annex 333-6353 cyerkes@illinois.edu Mon. and Wed. 11:00 - 12:00 Tues. and Thurs.2:00 - 3:00 or by appointment. Required Texts:. Chemistry, 8th ed., Zumdahl. Quiz sections begin: Wed., Aug. 24. Grading Policy:.

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Chemistry 102A

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  1. Chemistry102A Dr. Christine Yerkes 207 Chem Annex 333-6353 cyerkes@illinois.edu Mon. and Wed. 11:00 - 12:00 Tues. and Thurs.2:00 - 3:00 or by appointment

  2. Required Texts: Chemistry, 8th ed., Zumdahl Quiz sections begin: Wed., Aug. 24

  3. Grading Policy: On-line Homework: 60 pts. Discussion Quiz 40 pts. Quiz score: 150 pts.. Hour Exams (3 x 150) 450 pts. Final Exam 300 pts. 1000 pts. No make-up quizzes or exams

  4. Grades 1000 points total 97-100% (970 - 1000) = A+ 93 - 96% (930 - 969) = A 90 - 92% (900 - 929) = A- 87 - 89% (870 - 899) = B+ 83 - 86% (830 - 869) = B 80 - 82% (800 - 829) = B- etc., etc., etc.

  5. Quiz scores: weekly quizzes - material from Lecture and Quiz section each quiz worth 15 points - keep 10 highest On-line LON-CAPA attempt 1 100% attempt 2 90% attempt 3 80% 150 points

  6. Discussion Sections Discussion Quiz old hour exam problem Worksheets in groups 5 minutes 3 pts for correct 2 pts for partial 1 pt for attendance Keep 20 highest 40 pts max 20 bonus points

  7. On-line Homework: 10 (?) Homework assignments on Lon-Capa due dates in the on-line Syllabus and calendar credit for all problems completed by deadline normalized to 60 points

  8. Course Homepage http:// www. chem.uiuc.edu Course Web Sites Chem 102A Lon-Capa = net i.d. Password = AD password homepage

  9. understand nature Chemistry atomic or molecular level observation hypothesis experiment prediction

  10. Atoms, Molecules and Ions Atomic Theory of Matter John Dalton 1806 1. Matter consists of indivisible atoms • All atoms of a given element • have identical properties • Different elements have atoms that • differ in mass 4. Atoms are indestructible and chemical reactions are a rearrangement of atoms 5. Compounds contain a definite and small number of atoms

  11. 1. Matter consists of indivisible atoms • electrons • protons • neutrons subatomic particles electrons -1.60 x 10-19 C charge = = -1 = 9.1 x 10-31 kg mass protons charge = +1 mass = 1.673 x 10-27 kg neutrons charge = 0 mass = 1.675 x 10-27 kg

  12. 1. Matter consists of indivisible atoms nucleus = protons + neutrons move around the nucleus electrons electron “cloud” = volume of atom average diameter of atom 10-10 m = ångström (Å)

  13. 2. All atoms of a given element have identical properties X A Z ? not exactly atoms of an element = same number of protons = Z atomic number Z = 6 = C carbon 6C 6 e- Z = 30 = Zn zinc 30Zn 30 e- # protons = # e- elements neutral different # neutrons elements proton + neutron = A = mass number

  14. 2. All atoms of a given element have identical properties X A Z isotopes 7 nuclides of C element can have Z = 6 carbon 6C 12 most abundant 6 neutrons Carbon-14 dating C 6 14 6 protons + 8 neutrons

  15. 1 4. Atoms are indestructible and chemical reactions are a rearrangement of atoms 8 2 3 4 5 6 7 elements arranged by atomic number column group chemical properties row period

  16. Noble gases unreactive monatomic gases Alkali metals soft solids very, very reactive

  17. Alkaline earth metals solids reactive conduct heat, electricity solids (Hg) non-metals metals

  18. 4 5 6 7 3 = metalloids B5 C 6 N 7 O 8 F 9 Si 14 P 15 S 16 Cl17 As33 Se34 Br35 Te52 I 53 At85 Non-metals poor conductors solids, liquids, gases X2 Group 7 halogens very reactive

  19. Transition metals lanthanides actinides doesn’t fit anywhere H 1

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