Chem 115 Final Review
How to use this review
:
Use this review set to assess the material you know and the
find out what you don’t know.
These questions cover the basic aspects of the topics we
have covered in class. However,
knowing the answers to these problems should NOT
be considered sufficient for the exam.
If you are not able to do some of the problems, then go back and study the entire
section on that topic, focusing on the learning objectives in the appropriate weeks, the
readings, and the lectures.
You should also be able to do the sample lab problems on
the course website.
Constants:
R = 8.314 J/mol K = 0.0821 L atm/mol K
h = 6.626 x 10
−34
J s
c = 3.0 x 10
8
m/s
1 mol = 6.02 x 10
23
item
Some potentially helpful equations
PV = nRT
k
= 0.693/t
1/2
ln(N
0
/N) =
k
t
E = h
ν
= hc/
λ
Bohr energy levels of a hydrogen like atom:
E = C/n
2
where C is the Bohr constant
NUCLEAR CHEMISTRY
1.
Give the products that would be obtained upon alpha and beta decay of the
following nuclei:
a)
212
Bi
b)
221
Rn
c)
222
Fr
d)
253
Cf
2.
What is the product of the following fission reaction?
239
Pu
+
1
n
144
Ce
+
______
+
2
1
n
3.
One fission reaction of
235
U, produces
160
Sm, three neutrons and another nuclide.
What
is the other nuclide?
4.
The halflife for beta decay of
128
Sb is 9.1 hours.
How long will it take for 90% of
it to decay?
Page 1
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View Full DocumentATOMIC STRUCTURE
5.
The visible spectrum ranges from about 400 nm to 750 nm.
What is the range of
photon energies for visible radiation?
6.
Which of the following transitions in hydrogen atom involves the
absorption
of the
largest amount of energy?
a) n=1 to n=2
b)
n=2 to n=1
c) n=2 to n=3
d) n=3 to n=2
7.
Provide the electron configurations for the atoms and ions below.
Provide a
Lewis dot representation for each, indicating the number of valence electrons.
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 Fall '08
 Towns
 Chemistry, Atom, Electron, valence electrons Semiconductors, Group ____ elements, different electrical properties

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