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Chemistry 102A. Dr. Christine Yerkes 207 Chem Annex 333-6353 [email protected] 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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Chemistry 102a l.jpg

Chemistry102A

Dr. Christine Yerkes

207 Chem Annex

333-6353

[email protected]

Mon. and Wed. 11:00 - 12:00

Tues. and Thurs.2:00 - 3:00

or by appointment


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Required Texts:

Chemistry, 8th ed., Zumdahl

Quiz sections begin: Wed., Aug. 24


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Grading Policy:

On-line Homework: 60 pts.

Discussion Quiz 40 pts.

Quiz score:150 pts..

Hour Exams (3 x 150)450 pts.

Final Exam300 pts.

1000 pts.

No make-up quizzes or exams


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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.


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Quiz scores:

weekly quizzes -

material from Lecture and

Quiz section

each quiz worth 15 points -

keep 10 highest

On-lineLON-CAPA

attempt 1 100%

attempt 2 90%

attempt 3 80%

150 points


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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 highest40 pts max

20 bonus points


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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


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Course Homepage

http://

www.

chem.uiuc.edu

Course Web Sites

Chem 102A

Lon-Capa = net i.d.

Password = AD password

homepage


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understand nature

Chemistry

atomic or molecular level

observation

hypothesis

experiment

prediction


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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


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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


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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)


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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


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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


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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


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Noble gases

unreactive

monatomic gases

Alkali metals

soft solids

very, very reactive


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Alkaline earth metals

solids

reactive

conduct heat,

electricity

solids

(Hg)

non-metals

metals


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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


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Transition metals

lanthanides

actinides

doesn’t fit anywhere

H 1


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