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Sample Chemistry 115 Placement Exam
Please note that the sample exam is designed to illustrate the type and degree of
difficulty of the exam questions; it does not include questions from all of the topics that
will be on the actual placement exam. Simply studying the sample exam questions will
not prepare you for the placement exam.
Instructions: To use this exam as an indication of readiness for the placement exam,
give yourself 11 minutes to take the exam. If you can get 6 or more questions correct in
11 minutes, you are on track to get a passing grade on the Chem 115 placement exam.
Answers are on page three of this document, so just print the first two pages to
take the sample exam!
PERIODIC TABLE OF THE ELEMENTS
PERIOD
GROUP
IA
1
1
H
1
HYDROGEN
3
6.941
Li
2
LITHIUM
11
3
22.990
SODIUM
39.098
MAGNESIUM
20
40.078
3
21
IIIB 4
22
44.956
Sc
SCANDIUM
38
87.62
39
88.906
Sr
Y
RUBIDIUM
STRONTIUM
YTTRIUM
Cs
CAESIUM
87
(223)
56
137.33
Ba
BARIUM
88
(226)
Fr
Ra
FRANCIUM
RADIUM
57-71
La-Lu
Lanthanide
ZIRCONIUM
72
Ac-Lr
Actinide
HAFNIUM
(261)
VANADIUM
41
92.906
Cr Mn
NIOBIUM
180.95
Ta
TANTALUM
105
(262)
6
Fe
IRON
CHROMIUM MANGANESE
42
95.94
Nb Mo
73
55.845
51.996
43
(98)
Tc
44
101.07
Ru
MOLYBDENUM TECHNETIUM RUTHENIUM
74
183.84
W
TUNGSTEN
106
(266)
75
186.21
Re
RHENIUM
107
(264)
76
190.23
OSMIUM
108
(277)
Rf
Db
Sg
Bh
Hs
DUBNIUM
SEABORGIUM
BOHRIUM
HASSIUM
La
Ce
LANTHANUM
CERIUM
ACTINIDE
89 (227) 90
232.04
Co
COBALT
45
102.91
Rh
RHODIUM
77
192.22
Ir
IRIDIUM
109
(268)
58.693
Ni
NICKEL
46
106.42
Pd
PALLADIUM
78
195.08
Pt
PLATINUM
110
(281)
IIB
IB 12
30
11
29
65.39
63.546
Cu
Zn
ZINC
COPPER
47
107.87
Ag
SILVER
79
196.97
48
112.41
Cd
CADMIUM
80
200.59
Au Hg
GOLD
111
(272)
MERCURY
112
ALUMINIUM
31
28.086
GERMANIUM
50
118.71
Sn
TIN
INDIUM
81
82
204.38
Tl
THALLIUM
207.2
30.974
33
74.922
As
ARSENIC
51
121.76
Sb
OXYGEN
16
32.065
S
SULPHUR
34
78.96
Se
SELENIUM
52
127.60
18.998
F
ANTIMONY
TELLURIUM
84
(209)
HELIUM
10
35.453
Cl
CHLORINE
35
79.904
Br
BROMINE
53
126.90
I
IODINE
85
(210)
20.180
Ne
NEON
FLUORINE
17
Te
83
208.98
VIIA
18
39.948
Ar
ARGON
36
83.80
Kr
KRYPTON
54
131.29
Xe
XENON
86
(222)
Pb
Bi
Po
At
Rn
LEAD
BISMUTH
POLONIUM
ASTATINE
RADON
114
(285)
NITROGEN
15
PHOSPHORUS
72.64
GALLIUM
In
O
SILICON
Ge
114.82
N
P
Ga
49
VIA 17
15.999 9
Si
32
69.723
(289)
Uuq
Mt Uun Uuu Uub
MEITNERIUM UNUNNILIUM UNUNUNIUM
UNUNQUADIUM
UNUNBIUM
Copyright © 1998-2002 EniG. ([email protected])
140.91
Pr
60
144.24
61
(145)
62
150.36
231.04
63
151.96
Nd Pm Sm Eu
PRASEODYMIUM NEODYMIUM PROMETHIUM SAMARIUM
91
14
26.982
Al
VIIIB
10
9
27 58.933 28
Os
RUTHERFORDIUM
LANTHANIDE
57 138.91 58 140.12 59
7
Editor: Aditya Vardhan ([email protected])
178.49
Hf
89-103 104
(1) Pure Appl. Chem., 73, No. 4, 667-683 (2001)
Relative atomic mass is shown with five
significant figures. For elements have no stable
nuclides, the value enclosed in brackets
indicates the mass number of the longest-lived
isotope of the element.
However three such elements (Th, Pa, and U)
do have a characteristic terrestrial isotopic
composition, and for these an atomic weight is
tabulated.
91.224
Zr
Rb
132.91
TITANIUM
40
CARBON
BORON
13
ELEMENT NAME
VIB 7 VIIB 8
25 54.938 26
VB 6
24
50.942
V
Ti
Ca
85.468
IVB 5
23
47.867
C
B
RELATIVE ATOMIC MASS (1)
B
BORON
24.305
CALCIUM
55
7
10.811
VA 16
14.007 8
IVA 15
12.011 7
IIIA 14
10.811 6
13
5
IIIA
13
5
SYMBOL
BERYLLIUM
12
K
37
6
ATOMIC NUMBER
POTASSIUM
4
5
9.0122
Be
He
GROUP NUMBERS
CHEMICAL ABSTRACT SERVICE
(1986)
GROUP NUMBERS
IUPAC RECOMMENDATION
(1985)
IIA
2
4
Na Mg
19
18 VIIIA
2 4.0026
http://www.ktf-split.hr/periodni/en/
1.0079
92
238.03
Ac
Th
Pa
U
ACTINIUM
THORIUM
PROTACTINIUM
URANIUM
93
(237)
Np
94
(244)
64
157.25
Gd
EUROPIUM GADOLINIUM
95
(243)
96
(247)
65
158.93
AMERICIUM
CURIUM
162.50
67
164.93
Tb
Dy
Ho
TERBIUM
DYSPROSIUM
HOLMIUM
97
(247)
Pu Am Cm Bk
NEPTUNIUM PLUTONIUM
66
98
(251)
Cf
99
(252)
Es
BERKELIUM CALIFORNIUM EINSTEINIUM
1. A substance releases heat when it changes from
a. liquid to solid
b. solid to gas
c. liquid to gas
68
167.26
69
168.93
70
173.04
Er Tm Yb
ERBIUM
100
(257)
THULIUM
101
(258)
YTTERBIUM
102
(259)
Fm Md No
FERMIUM
MENDELEVIUM
71
174.97
Lu
LUTETIUM
103
(262)
Lr
NOBELIUM LAWRENCIUM
d. solid to liquid
2. Which element has exactly five electrons in the highest principal energy level (the
outer shell)?
a. B b. Ba c. P d. Mn
3. For a chemical reaction it is often found that the rate of reaction increases
significantly as the temperature is increased. The occurs because
a. the concentrations of the reactants increase
b. more reactants collide with energy equal to or greater than the activation
energy
c. the concentrations of the products decrease
d. the volume expands and there is more room for the products to form
4. Which substance does not obey the Lewis octet rule?
a. O2 b. NO
c. CO d. N2
5. For a calcium ion, Ca2+, with a mass number of 42, the number of protons, neutrons,
and electrons is
a. 20 protons, 22 neutrons, and 18 electrons.
b. 20 protons, 42 neutrons, and 22 electrons.
c. 20 protons, 42 neutrons, and 18 electrons.
d. 22 protons, 20 neutrons, and 22 electrons.
6. Which of the following pairs of elements would have the most similar chemical
properties?
a. H and He b. F and He c. O and S d. Li and Mg
7. Which of the following tends to form a cation (positive ion) with a charge of 2+?
a. Na b. O c. He d. Mg
8. Methane (CH4) can react with oxygen (O2) to produce carbon dioxide (CO2) and
water (H2O). The balanced chemical reaction shows that, for every mole of methane
reacted, the number of moles of water formed is:
a. 1/2 b. 1 c. 2 d. 4 e. 8
9. The correct formula for Nitric Acid is:
a. HNO
b. H2NO3
c. HNO2
d. HNO3
10. Titanaium reacts with element X to form a compound with the formula TiX2. Element
X exists as a solid at normal temperature and pressure. Element X must be
a. Oxygen b. Sulfur
c. Aluminum d. Calcium
11. How many moles of chloride ions are there in 1.0 L of 1.5 M MgCl2 (aq)?
a. 1.0 moles b. 1.5 moles c. 2.0 moles d. 3.0 moles
12. What is the mass of 10 moles of CO2?
a. 440 g
b. 280 g
c. 44 g
Answers are on the following page
Answers: 1a, 2c, 3b, 4b, 5a, 6c, 7d, 8c, 9d, 10b, 11d, 12a.
d. 28 g
The url for this document is http://www.chemistry.sfsu.edu/sample-chem-placement.html
First published: 14 June 2005.
Department of Chemistry & Biochemistry / contact us / revised 16 April 2012