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Week 1: September 15, 2011
SeptemberSunday Monday Tuesday Wednesday Thursday Friday Saturday
11 12 13 14 15 16 17
18 19 20 21
Assignment
DUE
22 23 24
25 26 27 28
Assignment
DUE
29 30 2 weeks til
midterm
Dr. Aziz Houmam
MWF 4:30-5:30
Moleis SLG
Thurs 2:30-5:30
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THATS WHAT HE SAID? Most important things you learned this week:
WHAT THE? Things you still dont understand:
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Alright, so its your first week at Guelph and you still dont know the
difference between MacKinnon and MacNaughton. You wake up at
4:00am to the sound of your roommate flushing the toilet (damn
those thin residence walls!). Try as you may, you cant get back to
sleep. After an hour of tossing and turning, youre angry. And still
awake. Instead of counting sheep, you decide to do go over the
rules for significant digits (because lets face it, the end result is all
zzzzzz):
Significant figures are:
1. All digits except zeros at the beginning of a number (ie 4560)2. Terminal zeros to the right of the decimal point (ie 4.00 cm, 9.30 m, 80.0 L all have
3)
3. Captured zeros (ie 606.5, 900456)4. Leading zeros are NEVER significant! (ie 0.0437, 0.736)5. Terminal zeros in a number without a decimal point given may or may not be
significant (ie 460 Is this 2 or 3? There is uncertainty associated with this
quantity. 460. This is 3, and this quantity is exact. Be careful!)
Some Practice: How many significant figures are there?
a) 40 _____ b) 90084 _____
c) 40230 _____ d) 0.00630 _____
e) 0.75x106
_____ f) 1.0x10-2
_____
g) 40.00 _____ h) 6.708 _____
Sig figs in calculations:
1. Multiplication and Division: The answer should have the number of significantdigits as the measured quantity in the question that has the least number of
significant digits
2. Addition and Subtraction: The answer should have the number of significant digitsafter the decimal as the measured quantity in the question that has the least
number of decimal places
More Practice:a) 17.354 3.65 b) 2.9 x 0.978
c) 31.0 / 3.215 d) 5.004 + 20
e) (6.78 + 10.0) / 3.140
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You jolt up in bed. You slept past your alarm! You run around the 2
square feet of floor space you have in a frenzy, trying to find your
right shoe. You stick your hand under your bed and think you feel a
shoe-like shape. You pull it outit is your shoe, but there is a gigantic
spider dangling on the end of it! Before you kill it, you pray to the
Chemistry God for absolution:
Highlight and label the following terms on the periodic table. Then define them by filling
in the blanks:
alkali metals(blue) elements in group ______ of the periodic table
alkali earth metals(green) elements in __________ 2 of the periodic table
halogens(orange) group exhibiting all three ___________ at room temperature
noble gases(yellow) group of extremely ________________ gases
transition metals(pink) are all __________ at room temperature
Non-metals are (usually) gaseous at room temperature. Metals are (usually) solid.
Which two elements in the periodic table are liquid at room temperature?
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Finally you can cram your shoe on and head out the door. As you walk
past a clump of trees, something hits you in the head. What? You look
around and notice a squirrel in a tree staring at you. It is the physical
embodiment of evil: red eyes, frothing mouth, bushy tail, and in its
hands is another acorn waiting to make contact with your head. To
run away from the rabid squirrel you must solve these problems:
1. The quantum numbers are: principal, angular momentum, magnetic and spin. Theyare represented by which letters (respectively):
a) n, , m, s b) p, , m, s
c) n, , m, s d) n, , m, ms
2. Which of the following statements are true about angular momentum quantumnumber:
i. Describes number of orbitalsii. Refers to the main energy leveliii. Describes the shape of the electron orbitals
a) i and ii are true b) only iii is true
c) i and iii are true d) only ii is true
3. What are the possible values of the magnetic quantum number for a 5p electron?a) -2, -1, 0, +1, +2 b) -5, -4, -3, -2, -1, 0, +1, +2, +3, +4, +5
c) -3, -2, -1, 0, +1, +2, +3 d) 0
4. Which set of numbers refers to a 4s orbital?a) 4, 1, 0, + b) 4, 0, 0, -
c) 4, 0, -1, - d) 4, -1, 0, +
5. Which set of numbers refers to a 5f orbital?a) 5, 3, +4, - b) 5, 4, +5, +
c) 5, 3, -2, - d) 5, 4, -3, +
6. The electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 is for:a) Ca b) Mg
c) K d) does not exist
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7. The electron configuration 1s2 2s2 2p6 3s2 3p6 3d10 4p3 is for:a) Fe b) As
c) Ga d) does not exist
8. Hunds rule states that as an orbital fills up, electrons:a) float around aimlessly b) pair up first
c) pair up after all orbitals are occupied d) build up the atom
9. The valence electrons for Cl- occupy the ___ orbital:a) s b) p
c) d d) f
10.The maximum number of electrons in any major (principal) level is:a) 2n
2b) 4n
c) 2n3 d) n2
Whew! That was close! You duck another acorn as you skid
around the trees. You can see your classs building in the
distance and start heading that way. But for some reason, the
more you walk, the steeper the road is getting. In five minutes,
it feels like youre climbing Everest and youre really regretting
all those hours you spent on the couch this past summer watching TV and eating
cheese. Luckily, a Physical Resource car is nearby and since you have no opposition
to grand theft auto, well... Unfortunately, there is a code you need to enter to get
the engine to start. Here is the hint:
Cross out all the electron configurations that DO NOT exist and name the element for
the electron configurations that DO exist. You should be left with a 5-word phrase of the
letters you DID NOT cross out!
GE [Ar] 3d5
4s2
_Mn_
TI 1s2 2s2 3s2 3p6 _----_
TO [Ne] 3s1
_____
UT [Kr] 3d8
4s2
_____
JO [Ar] 4s2
4d1
_____
FA 1s2
2s1
2p6
_____
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OF 1s2
2s2
2p6
3s2
3p6
3d10
4s1
_____
JA [Xe] 4f7
6s2
_____
LM [Ne] 3d5
4s2
_____
IL 1s2
2s2
2p6
3s2
3p6
3d10
4s2
4p3
_____
FR 1s2
2s2
2p4
_____
YE 1s2
2s2
2p6
3s2
3d1
_____
PU [He] 2s2
2p6
3d1
_____
EE [Kr] 4d2
5s2
_____
Your 5-word phrase: GE__________________________________________________
You dispose of the car behind a bush and head into your building. Youare just rounding the corner to your class when you bump into
someone wearing an extremely stained lab coat. He looks lost but like
hes concentrating really hard at the same time. You tentatively ask
him if hes alright when he suddenly grabs your arm. Turns out, hes a
Chemistry professor and he desperately needs your help:
Element Electron configuration Orbital representation
s p d7N
13Al
24Cr
18Ar
2Li
20Ca
9F
47Ag
14Si
80Hg
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Dr. X thanks you and heads back to his lab (which you think
is the source of the explosions you can hear). Just as you get
to the door of your classroom, someone blocks your way.
You try to walk around them but theyjust wont let you in. It
turns out its another student looking for their classroom. Youre really late already
(and frankly, you have no idea if shes even speaking a language known to man),
but she looks like she could take you. She hands you a map but it isnt of the
campus. Oh no. Its of a periodic table:
Highlight and label 4 sections of the periodic table:
s orbital green
p orbital pink
dorbital yellowforbital blue
BEEP BEEP BEEEEEEP! You jolt up in bed. Wait, what? Youre in your bedroom and
your roommate is snoring gently. Was that all just a dream? As you get dressed for
the morning, you feel prepared for the day, because honestly, how could it be any
worse?
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TIPS for the Course:
1. Go to lectures they help2. Read your lab manual before labs it will make things go faster and help on quizzes3. Do the practice quizzestheyre a really great source for the type of questions that
show up on the actual quizzes
4. Ask questions in class, privately, on D2L discussion boards5. Use all your resources see the Prof, go to the Chem help room (LIB 354), talk to
TAs
6. PRACTICE, PRACTICE, PRACTICE no better way to solidify your knowledge7. Come to SLGtheyre fun and helpful
See you next Thursday!
