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Chemistry 116: General Chemistry
Syracuse University Project Advance
Exam #4, Spring 2006
Name
Date
The last page of each examination is a periodic table.
1. An atom with 15 protons and 18 neutrons is an isotope of
A.
B.
C.
D.
E.
argon
arsenic
chlorine
phosphorus
sulfur
2. The nuclide symbol -10 e represents a(n)
A.
B.
C.
D.
E.
electron
proton

neutron
positron
gamma photon
3. A positron has the same mass as
A.
B.
C.
D.
E.
a gamma ray
a neutron
an alpha particle
a proton
a beta particle
4. When 235
92 U is bombarded with one neutron, fission occurs. The products are two
neutrons, 144
55 Cs, and

A.
B.
C.
D.
E.
139
56
90
37
143
55
89
37
94
36




 CHE 116
Ba
Rb
Cs
Rb
Kr
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Spring 2006 Exam #4
5. In the ejection of a beta particle from the nucleus, (Hint: How could an electron exist
in the nucleus…do the math)
A.
B.
C.
D.
E.
a positron is converted to a neutron.
a neutron is converted to a positron.
a neutron is converted to a protron.
a protron is converted to a neutron.
a neutron is converted to a electron.
6. The radiation that has the highest penetration power is
A.
B.
C.
D.
E.
gamma.
beta.
positron.
X-ray.
alpha.
7. Of the following nuclides, the one most likely to be radioactive is




A.
B.
C.
D.
E.
40
20
48
22
208
82
222
86
198
79
Ca
Ti
Pb
Rn
Au
8. The half-life of the radioisotope 130
55 Cs is 30 minutes. How long would it take for a
160.0-g sample to decay to 1.25 g?
A.
B.
C.
D.
E.
3.5 h
4.5 h
6.0 h
7.0 h
8.5 h

9. As a radioactive isotope decays, its half-life _____ and its rate of disintegration _____.
A. remains the same, remains the same
B. remains the same, increases
C. remains the same, decreases
D. decreases, remains the same
E. decreases, decreases
CHE 116
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Spring 2006 Exam #4
10. Enriched uranium is uranium that has a greater proportion of
A.
B.
C.
D.
E.
deuterons.
lead-207.
lead-208.
uranium-235.
uranium-238.
11. A certain radioactive element present in a sample decays from an initial amount of
1.0 x 103 atoms to a final amount of 2.5 x 102 atoms in 10 minutes. What is the half life
of this radioactive element?
A.
B.
C.
D.
E.
10 minutes
5 minutes
20 minutes
2.5 minutes
Not enough information given to calculate answer
12. When polonium-214, 214Po84 , decays the emission consists consecutively of an alpha
particle, two beta particles, and finally another alpha particle. The resulting stable
nucleus is
A.
B.
C.
D.
E.
206
Pb82
Bi83
210
Bi83
210
Ti81
208
Pb82
206
13. The actual mass of an atom is always less than the sum of the masses of its
constituent particles. The energy equivalent of this mass difference is termed the binding
energy of the nucleus. What is the binding energy per nucleon for 55Mn25 ?
(1 amu = 931 MeV , million electron volts)
Isotopic Masses of Some Nuclides
1
n0
H1
1.00867 amu
1.00782 amu
A. 8.2 MeV per nucleon
B. 8.8 MeV per nucleon
C. 9.2 MeV per nucleon
D. 92 MeV per nucleon
E. 482 MeV per nucleon
1
CHE 116
3
55
Mn25
54.9381 amu
Spring 2006 Exam #4
14. Which one of the following processes results in an increase in the atomic number?
A. gamma emission
B. positron emission
C. beta emission
D. alpha emission
E. corrosion
15.The missing product from this reaction is
121
A)
B)
C)
D)
E)
I53  121Te52 +
4
He2
e-1
1
n0
0
e1
none of the above
0
16. What happens to the mass number and the atomic number of an element when it undergoes
beta decay?
A)
B)
C)
D)
E)
neither the mass number nor the atomic number change.
the mass number decreases by 4 and the atomic number decreases by 2
the mass number does not change and the atomic number increases by 1
the mass number does not change and the atomic number decreases by 2
the mass number increases by 2 and the atomic number increases by 1
17. Which one of the following is a pair of isotopes of the same element?
A)
116
2+
92 X
and
119
92X
2+
2+
B) 116
and 122
92X
89X
C)
96
45 X
and 116
92 X
2+
4+
D) 233
and 116
99X
92X
E)
CHE 116
11
5X
and 116X
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Spring 2006 Exam #4
18. Which functional group does NOT contain an oxygen atom?
A.
B.
C.
D.
E.
ketone
alkyne
aldehyde
ester
alcohol
19. The compound
NH2
is classified as a
CH3 CHCH2CH2CH3
A.
B.
C.
D.
E.
primary amide.
secondary amide.
tertiary amide.
secondary amine.
tertiary amine.
20. The correct name for
CH3CH2 CH3
is
H3C CH CH
CH3
A.
B.
C.
D.
E.
1,1-dimethyl-2-ethylpropane.
2,3-dimethylpentane.
2-methyl-3-ethylbutane.
isoheptane.
2-ethyl-3-methylbutane.
21. How many hydrogen atoms are needed to complete the following hydrocarbon
structure?
A.
B.
C.
D.
E.
C
C
C
C
4
5
6
8
10
CHE 116
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Spring 2006 Exam #4
22. The name of the compound CH2=CH-CH=CH-CH2CH3 is
A)
B)
C)
D)
E)
hexadiene
1,2,3,4 hexadiene
3,5 hexadiene
1,3 hexadiene
3,4 hexadiene
23. Amides are formed via dehydration synthesis of which two organic functional
groups?
A.
B.
C.
D.
E.
ester and amine
amine and carboxylic acid
alcohol and carboxylic acid
alcohol and amine
ester and carboxylic acid
24. While alkenes and alkynes readily undergo
hydrocarbons do not. Instead they undergo
A.
B.
C.
D.
E.
reactions, aromatic
reactions.
addition, substitution
elimination, substitution
substitution, elimination
substitution, addition
addition, elimination
25. Which of the following molecules has the longest C–C bond distance?
A.
B.
C.
D.
E.
H3CCH3
H2CCH2
HCCH
H2CCO
C6H6
26. Which of the following molecules has an sp2-hybridized carbon atom?
A.
B.
C.
D.
E.
CH3OH
ClCH2CCH
CO2
CH2O
CCl4
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Spring 2006 Exam #4
27. Which one of the following could be a cyclic alkane?
A)
B)
C)
D)
E)
CHE 116
C5H5
C3H6
C4H6
C2H6
C9H20
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Spring 2006 Exam #4