1. Chemistry 102A Dr. Christine Yerkes 207 Chem Annex 333-6353
Mon. and Wed. 11: :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: pts..
Hour Exams (3 x 150) 450 pts.
Final Exam pts.
1000 pts.
No make-up quizzes or exams

4. Grades 1000 points total 97-100% (970 - 1000) = A+
% ( ) = B+
% ( ) = B
% ( ) = B-
etc., etc., etc.

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

6. Discussion Sections
Worksheets in groups
Discussion Quiz old hour exam problem
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 Course Web Sites Chem 102A Lon-Capa = net i.d.
www.
chem.uiuc.edu
Course Web Sites
Chem 102A
Lon-Capa = net i.d.
Password = AD password
homepage

9. Chemistry
understand nature
atomic or molecular level
observation
experiment
hypothesis
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
charge =
-1.60 x C
= -1
mass
= 9.1 x kg
protons
charge
= +1
mass
= x kg
neutrons
charge
= 0
mass
= x kg

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

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

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

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

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

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

19. Non-metals = metalloids poor conductors solids, liquids, gases Group 7
Si 14
C 6
B 5
N 7
O 8
F 9
P 15
S 16
Cl 17
As33
Se34
Br35
Te52
I 53
At85 3 4 5 6 7
= metalloids
poor conductors
solids, liquids, gases
Group 7
halogens X2
very reactive

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