Matching
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Match each item with the correct statement below. a. | coordinate
covalent bond | d. | single covalent
bond | b. | double covalent
bond | e. | polar
bond | c. | structural
formula | f. | hydrogen
bond | | | | |
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1.
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a
depiction of the arrangement of atoms in molecules and polyatomic ions
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2.
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a
covalent bond in which only one pair of electrons is shared
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3.
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a
covalent bond in which two pairs of electrons are shared
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4.
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a
covalent bond in which the shared electron pair comes from only one of the atoms
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5.
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a
covalent bond between two atoms of significantly different electronegativities
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6.
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a
type of bond that is very important in determining the properties of water and of important
biological molecules such as proteins and DNA
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Match each item with the correct statement below. a. | network
solid | e. | tetrahedral
angle | b. | bonding orbital | f. | VSEPR theory | c. | dipole
interaction | g. | sigma
bond | d. | bond
dissociation energy | | | | |
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7.
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energy needed to break a single bond between two covalently bonded atoms
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8.
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symmetrical bond along the axis between the two nuclei
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9.
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molecular orbital that can be occupied by two electrons of a covalent
bond
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10.
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109.5
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11.
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shapes adjust so valence-electron pairs are as far apart as possible
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12.
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attraction between polar molecules
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13.
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crystal in which all the atoms are covalently bonded to each other
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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14.
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Which
is a typical characteristic of an ionic compound? a. | Electron pairs are shared among
atoms. | b. | The ionic compound has a low solubility in
water. | c. | The ionic compound is described as a
molecule. | d. | The ionic compound has a high melting
point. | | |
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15.
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Which
of these elements does not exist as a diatomic molecule?
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16.
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How
do atoms achieve noble-gas electron configurations in single covalent bonds? a. | One atom
completely loses two electrons to the other atom in the bond. | b. | Two atoms share
two pairs of electrons. | c. | Two atoms share two electrons. | d. | Two atoms share
one electron. | | |
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17.
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Which
noble gas has the same electron configuration as the oxygen in a water molecule? a. | helium | c. | argon | b. | neon | d. | xenon | | | | |
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18.
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When
one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n)
____. a. | one-sided
covalent bond | c. | coordinate
covalent bond | b. | unequal covalent bond | d. | ionic covalent bond | | | | |
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19.
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In
which of the following compounds is the octet expanded to include 12 electrons?
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20.
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According to VSEPR theory, molecules adjust their shapes to keep which of the
following as far apart as possible? a. | pairs of valence electrons | c. | mobile electrons | b. | inner shell
electrons | d. | the electrons
closest to the nuclei | | | | |
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21.
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The
shape of the methane molecule is called ____. a. | tetrahedral | c. | four-cornered | b. | square | d. | planar | | | | |
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22.
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What
causes water molecules to have a bent shape, according to VSEPR theory? a. | repulsive forces
between unshared pairs of electrons | b. | interaction between the fixed orbitals of the unshared pairs of
oxygen | c. | ionic attraction and repulsion | d. | the unusual
location of the free electrons | | |
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23.
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Which
of the following atoms acquires the most negative charge in a covalent bond with
hydrogen?
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24.
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Which
of the following covalent bonds is the most polar?
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25.
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When
placed between oppositely charged metal plates, the region of a water molecule attracted to the
negative plate is the ____. a. | hydrogen region of the molecule | c. | H—O—H plane of the molecule | b. | geometric center
of the molecule | d. | oxygen region of
the molecule | | | | |
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26.
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What
causes dipole interactions? a. | sharing of electron pairs | b. | attraction
between polar molecules | c. | bonding of a covalently bonded hydrogen to an unshared electron
pair | d. | attraction
between ions | | |
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27.
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What
type of ions have names ending in -ide? a. | only cations | c. | only metal ions | b. | only
anions | d. | only gaseous
ions | | | | |
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28.
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When
Group 2A elements form ions, they ____. a. | lose two protons | c. | lose two electrons | b. | gain two
protons | d. | gain two
electrons | | | | |
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29.
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What
is the correct name for the N
ion? a. | nitrate
ion | c. | nitride
ion | b. | nitrogen
ion | d. | nitrite
ion | | | | |
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30.
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When
naming a transition metal ion that can have more than one common ionic charge, the numerical value of
the charge is indicated by a ____. a. | prefix | c. | Roman numeral following the name | b. | suffix | d. | superscript
after the name | | | | |
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31.
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Aluminum is a group 3A metal. Which ion does A1 typically form?
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32.
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In
which of the following are the symbol and name for the ion given correctly?
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33.
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In
which of the following are the symbol and name for the ion given correctly?
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34.
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Which
of the following correctly provides the names and formulas of polyatomic ions?
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35.
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An
-ate or -ite at the end of a compound name usually indicates that the compound contains
____. a. | fewer electrons
than protons | c. | only two
elements | b. | neutral molecules | d. | a polyatomic anion | | | | |
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36.
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Which
of the following compounds contains the Mn
ion?
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37.
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How
are chemical formulas of binary ionic compounds generally written? a. | cation on left,
anion on right | b. | anion on left, cation on right | c. | Roman numeral
first, then anion, then cation | d. | subscripts first, then ions | | |
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38.
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Which
of the following formulas represents an ionic compound?
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39.
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Which
element, when combined with fluorine, would most likely form an ionic compound? a. | lithium | c. | phosphorus | b. | carbon | d. | chlorine | | | | |
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40.
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Which
of the following compounds contains the lead(II) ion?
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41.
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Which
of the following is a binary molecular compound? a. | BeHCO | c. | AgI | b. | PCl | d. | MgS | | | | |
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42.
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Which
of the following formulas represents a molecular compound? a. | ZnO | c. | SO | b. | Xe | d. | BeF | | | | |
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43.
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When
dissolved in water, acids produce ____. a. | negative ions | c. | hydrogen ions | b. | polyatomic
ions | d. | oxide
ions | | | | |
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44.
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When
naming acids, the prefix hydro- is used when the name of the acid anion ends in
____.
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45.
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When
the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix
____.
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46.
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In
any chemical compound, the elements are always combined in the same proportion by
____. a. | charge | c. | volume | b. | mass | d. | density | | | | |
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Numeric Response
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47.
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How
many valence electrons does an iodine atom have?
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48.
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How
many electrons does a nitrogen atom need to gain in order to attain a noble-gas electron
configuration?
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49.
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How
many electrons does carbon need to gain in order to obtain a noble-gas electron
configuration?
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50.
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What
is the bond angle in a water molecule?
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