Chemistry 105-1F_Fall 2015
Practice exam II
1) What element does the chemical symbol Ta represent?
A. terbium
B. titanium
D. technetium
E. tungsten
2)
A.
B.
C.
D.
E.
Name:____________________
C. tantalum
Which of the following phrases best describes nonbonding electrons?
electrons in a valence shell which are not shared in a molecule
electrons which are gained or lost when an atom ionizes
electrons which count toward the octets of multiple atoms
electrons which reside in an inner shell in an atom
electrons which do not count toward an atom’s octet
3) Which of the following is best described as a covalent compound?
A. SBr2
B. NaCN
C. CaSO4
D. NH4F
E. CuCl2
4) Which of the following elements exists as a homodiatomic molecule in its elemental form?
A. sulfur
D. bromine
B. germanium
E. neon
C. beryllium
5) Which of the following accurately represents the Lewis structure for an atom of arsenic?
A.
B.
C.
D.
E.
6) What is the proper name for the compound with the chemical formula Na2SO4 ?
A. sodium (II) sulfate
B. disodium phosphide
C. sodium sulfur tetroxide
D. sodium sulfate
E. sodium persulfite
7) Which of the following statements is true about the halogens?
A. All halogen atoms have seven valence electrons
B. All halogen atoms tend to ionize by losing an electron
C. All halogen atoms will combine with noble gases in chemical reactions
D. All halogen atoms have only one isotope
E. All halogen atoms have an even number of protons
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Chemistry 105-1F_Fall 2015
Practice exam II
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8) What is the proper chemical formula for the compound dinitrogen tetrachloride?
A. N2ClO4
B. N2Cl4
C. NCl2
D. N2Cl3
E. N4Cl2
9) Which of the following properly represents a molecule of SiS2?
A.
B.
D.
E.
C.
10) As a general term, the force between particles with positive and negative charges is best
described as…
A. electrostatic attraction
B. oppositional forces
C. complementary interstation
D. charge impetus
E. leveling tendency
11) What is the proper chemical formula for the compound copper (I) sulfide?
A. CuSO3
D. Cu2S
B. Cu2SO4
E. CuS2
C. CuS
12) What would be the charge expected on a particle produced when a cesium atom ionizes?
A. -3
B. -2
C. -1
D. +1
E. +2
13) What name ending is associated with a monoatomic anion?
A. –ium
B. –ate
C. –ine
D. –ide
E. –ite
14) Of the elements listed here, which has the largest value for electronegativity?
A. selenium
D. aluminum
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B. iodine
E. oxygen
C. calcium
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Chemistry 105-1F_Fall 2015
Practice exam II
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15) An atom of which of the following elements has 5 valence electrons?
A. antimony B. krypton
C. niobium
D. rubidium E. rhenium
16) Which of the following represents the identity and charge of a particle with 42 protons, 44
neutrons, and 39 electrons?
A. Mo5+
B. Mo3+
C. Mo2+
D. Mo2E. Mo3-
17) What is the proper name for the compound with the chemical formula SBr2 ?
A. sulfur dibromate
B. silicon perbromide
C. sulfur dibromide
D. sulfur (II) bromide
D. silicon perbromate
18) Which exception to the octet rule would be expected in a molecule of OCl?
A. expanded octet
B. odd number of electrons
C. proton gain
D. incomplete octet
E. quadruple bond
19) Which of the following ions is isoelectronic with argon?
A. FB. KrC. Ca2+
D. Na+
E. Si2-
20) Elements A and B form a diatomic compound. What electronegativity difference elements A
and B would allow this to be most properly classified as an ionic compound?
A. -0.93
B. 0.27
C. 0.62
D. 1.47
E. 1.93
21) How many bonds would be expected in a molecule of N2F4 ?
A. four
B. five
C. six
D. seven
E. eight
22) Based on the Lewis structure shown here, what would be the
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Chemistry 105-1F_Fall 2015
Practice exam II
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expected charge on this particle?
A. -2
B. -1
C. 0
D. +1
E. +2
23) What would be the geometry of a molecule of NCl3?
A. trigonal planar
D. tetrahedral
B. bent
E. trigonal pyramidal
C. linear
24) Which of the following would be a nonpolar molecule?
A.
B.
C.
D.
E. more than one would be nonpolar
Common Polyatomic Negative Ions
-1 ions
CH3CO2NO3NO2MnO4CNSCNBrO3BrO2-
bicarbonate
(hydrogen carbonate)
acetate
nitrate
nitrite
permanganate
cyanide
thiocyanate
bromate
bromite
CO32SO42SO32S2O32C2O42-
carbonate
sulfate
sulfite
thiosulfate
oxalate
PO43BO33-
phosphate
borate
HCO3-
ClO4ClO3ClO2ClOOHIO4IO3-
hydrogen sulfate
(bisulfate)
perchlorate
chlorate
chlorite
hypochlorite
hydroxide
periodate
iodate
O22CrO42Cr2O72HPO42-
peroxide
chromate
dichromate
hydrogen phosphate
AsO43-
arsenate
HSO4-
-2 ions
-3 ions
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Chemistry 105-1F_Fall 2015
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Name:____________________
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