CHM 080 – Spring 2012 – K. Young
Practice Exam #1
Answer Sheet
Name___________________
Each question is worth 1 point, the entire exam will be scaled up to 100 points total (e.g. all 78 correct = 100
points). You may use your cheat sheet, your calculator, the periodic table, and, of course, your brain!
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
Multiple Choice
1) Calcium carbonate (CaCO3) is 34.5% Ca by mass. In a 418 g sample of CaCO3, how many grams of calcium are present?
A) 144 g
B) 40.08 g
C) 235.1 g
D) 83.6 g
Topic: Section 3.1
2) According to the experiments of Ernest Rutherford, where can a majority of a given atom's mass be found?
A) scattered randomly throughout an approximately cube-shaped atom
B) at the center of an approximately spherical atom
C) in concentric layers of spherical shape
D) as small pieces orbiting a common center in circular paths
Topic: Section 3.3
3) How many neutrons does the nucleus of the phosphorus-32 isotope have?
A) 15
B) 16
C) 17
D) 32
Topic: Section 3.4
4) What is the atomic number of uranium-235?
A) 235
B) 238
C) 92
D) 143
Topic: Section 3.4
5) A 3.45 gram sample of hematite (Fe2O3) that contains 2.41 grams of Fe has what percentage Fe by mass?
A) 40%
B) 30%
C) 70%
D) 60%
Topic: Section 3.4
6) How is the term "atomic number" defined for a given atom or isotope?
A) as the mass of one mole of that element or isotope
B) as the sum of the protons, neutrons, and electrons it contains
C) as the sum of the protons and neutrons its nucleus contains
D) as the number of protons its nucleus contains
Topic: Section 3.4
7) A neutral atom's atomic number is equal to ________.
A) the number of nucleons
B) the sum of protons and neutrons
C) the number of electrons
D) the number of neutrons
Topic: Section 3.4
8) What element does X represent the symbol 55
25 X ?
A) zinc
B) iron
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
C) iridium
D) cesium
E) manganese
Topic: Section 3.4
9) What element does X represent the symbol 107
47 X ?
A) silver
B) gold
C) bohrium
D) cobalt
E) neodymium
Topic: Section 3.4
10) Which of the following terms applies to the vertical columns found on a periodic table?
A) Arrangement
B) Group
C) Period
D) Isotope
Topic: Section 3.6
11) Which of the following terms applies to the horizontal rows found on a periodic table?
A) Arrangement
B) Group
C) Period
D) Isotope
Topic: Section 3.6
12) What name is commonly given to the elements of Group IA of the periodic table?
A) Alkaline earth metals
B) Transition metals
C) Platinum metals
D) Alkali metals
Topic: Section 3.6
13) Which of the following is a metalloid in the third period of the periodic table?
A) Al
B) Si
C) P
D) S
Topic: Section 3.6
14) Which of the following elements is a chalcogen?
A) H
B) N
C) O
D) F
Topic: Section 3.6
15) Which of the following is a transition element?
A) Co
B) Eu
C) Es
D) He
Topic: Section 3.6
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
16) Which element, isotope, or ion listed below contains 16 protons, 17 neutrons, and 18 electrons?
A) 33Ar2B) 33S2C) 33Cl
D) 34S2Topic: Section 3.7
17) Which of the following elements may have a cation that has 16 electrons?
A) Si
B) P
C) S
D) Cl
Topic: Section 3.7
18) Which of the following elements can have an anion with 18 electrons?
A) Cl
B) Ar
C) Sc
D) Fe
Topic: Section 3.7
19) Which of the following has the highest ionization energy?
A) O
B) Sn
C) As
D) C
Topic: Section 3.7
20) How many electrons are found in a Fe3+ ion?
A) 23
B) 26
C) 29
D) 56
Topic: Section 3.7
21) Which of the following has more electrons than neutrons?
A) 24Mg+2
B) 27Al
C) 75As-3
D) 32S-2
Topic: Section 3.7
22) Which of the following pairs are isotopes?
A) Ca+2 and Mg+2
B) 199Hg and 200Hg
C) 18O and 19F
D) 238U and 238Np
Topic: Section 3.7
23) Which cation may have atomic number 20 and a charge of +2?
A) C+2
B) Mg+2
C) Ca+2
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
D) S+2
Topic: Section 3.7
True/False
24) The conservation of mass law states that matter can neither be created nor destroyed during a chemical reaction.
TRUE or FALSE? (Circle one)
Topic: Section 3.1
25) The law of multiple proportions can be used to explain why it is possible that both CO and CO 2 can exist, differing only in their
carbon-to-oxygen ratios
TRUE or FALSE? (Circle one)
Topic: Section 3.1
26) A neutral atom of the isotope phosphorus-32 contains 15 protons, 17 neutrons, and 15 electrons.
TRUE or FALSE? (Circle one)
Topic: Section 3.4
27) The oxygen-17 isotope has more protons than neutrons in its nucleus.
TRUE or FALSE? (Circle one)
Topic: Section 3.4
28) The amu for an atom is the weighted average of all the naturally occurring isotopes.
TRUE or FALSE? (Circle one)
Topic: Section 3.4
29) Group IIA of the periodic table contains elements that are gaseous non-metals.
TRUE or FALSE? (Circle one)
Topic: Section 3.6
30) Radium is the only noble gas that is radioactive.
TRUE or FALSE? (Circle one)
Topic: Section 3.6
31) Iodine is the only non-metal that is a solid at room temperature.
TRUE or FALSE? (Circle one)
Topic: Section 3.6
32) The most stable isotope of oxygen has 8 neutrons.
TRUE or FALSE? (Circle one)
Topic: Section 3.6
33) One needs to supply energy from an outside source to form a cation from a neutral atom.
TRUE or FALSE? (Circle one)
Topic: Section 3.7
Short Answer
Write the atomic symbols for the following neutral isotopes.
34) lead-207
Topic: Section 3.4
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
35) uranium-235
Topic: Section 3.4
Matching
Match every element with its symbol from the list below.
A) Ni
B) Po
C) Ag
D) Rn
E) K
F) Ra
G) Au
H) N
I) Si
J) Na
K) Pa
L) Mn
M) S
N) Mg
O) Cu
P) Co
Q) P
36) Sulfur
Topic: Section 3.4
37) Potassium
Topic: Section 3.4
38) Manganese
Topic: Section 3.4
39) Magnesium
Topic: Section 3.4
40) Radium
Topic: Section 3.4
41) Radon
Topic: Section 3.4
42) Nitrogen
Topic: Section 3.4
43) Nickel
Topic: Section 3.4
44) Polonium
Topic: Section 3.4
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
45) Protactinium
Topic: Section 3.4
46) Sodium
Topic: Section 3.4
47) Silver
Topic: Section 3.4
48) Silicon
Topic: Section 3.4
49) Phosphorus
Topic: Section 3.4
50) Gold
Topic: Section 3.4
51) Copper
Topic: Section 3.4
52) Cobalt
Topic: Section 3.4
Match the scientist with his contribution to the chemistry field from the list below.
A) Proved that matter is always conserved
B) Demonstrated the existence of the neutron
C) Believed that the matter could be infinitely subdivided
D) Rationalized that matter is neither created nor destroyed
E) Discovered the electron
F) Discovered (with Thomson) the proton
G) Constructed the periodic table
H) Postulated that matter is made up of tiny atoms
53) Antoine Lavoisier
Topic: Section 3.5
54) Democritus
Topic: Section 3.5
55) Aristotle
Topic: Section 3.5
56) Dmitri Mendeleev
Topic: Section 3.5
57) John Dalton
Topic: Section 3.5
58) J.J. Thomson
Topic: Section 3.5
59) James Chadwick
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
Topic: Section 3.5
60) E. Goldstein
Topic: Section 3.5
Match every element with an occurrence from the list below.
A) Pop cans
B) Bicycle Frames
C) Steel
D) Diamonds
E) Computer Chips
F) Thermometers
G) Plating car bumpers
H) Antacids
61) Silicon
Topic: Section 3.6
62) Chromium
Topic: Section 3.6
63) Magnesium
Topic: Section 3.6
64) Carbon
Topic: Section 3.6
65) Iron
Topic: Section 3.6
66) Mercury
Topic: Section 3.6
67) Titanium
Topic: Section 3.6
68) Aluminum
Topic: Section 3.6
Match each statement in the questions with the correct species from the list below.
A) 23Na+
B) 7Be
C) 4He+
D) 12C
E) 35C1F) 1H or 1H+
G) 1H+
H) 3H
I) 27A1
J) 30p
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CHM 080 – Spring 2012 – K. Young
Practice Exam #1
69) Has a mass number equal to 27
Topic: Section 3.7
70) Has ten electrons
Topic: Section 3.7
71) Has a nuclear charge of +15
Topic: Section 3.7
72) Has an equal number of protons, neutrons, and electrons
Topic: Section 3.7
73) Has no neutrons
Topic: Section 3.7
74) Has a number of electrons equal to that of neutrons, but different than that of protons
Topic: Section 3.7
75) Has no electrons
Topic: Section 3.7
76) Has a number of neutrons (other than zero) which is less than the number of protons
Topic: Section 3.7
77) Has a number of neutrons twice that of protons
Topic: Section 3.7
78) Has a number of neutrons twice that of electrons
Topic: Section 3.7
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