Multiple Choice Identify the
choice that best completes the statement or answers the question.
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1.
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A compound held together by ionic bonds is called a ____.
a. | diatomic molecule | c. | covalent molecule | b. | polar compound | d. | salt |
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2.
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Which of the following is true about an ionic compound?
a. | It is a salt. | c. | It is composed of anions and cations. | b. | It is held together
by ionic bonds. | d. | all of the
above |
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3.
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How many valence electrons are transferred from the nitrogen atom to potassium
in the formation of the compound potassium nitride?
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4.
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How many valence electrons are transferred from the calcium atom to iodine in
the formation of the compound calcium iodide?
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5.
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What is the formula unit of sodium nitride?
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6.
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What is the formula unit of aluminum oxide?
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7.
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What is the name of the ionic compound formed from lithium and bromine?
a. | lithium bromine | c. | lithium bromium | b. | lithium bromide | d. | lithium bromate |
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8.
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What is the formula for sodium sulfate?
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9.
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Alloys are commonly used in manufacturing. Which of the following is NOT a
reason to use an alloy instead of a pure metal?
a. | Bronze is tougher than pure copper. | c. | Brass is more malleable than pure
copper. | b. | Sterling silver is stronger than pure silver. | d. | Cast iron is more brittle than pure
iron. |
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10.
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Which of the following compounds has the formula KNO ?
a. | potassium nitrate | c. | potassium nitrite | b. | potassium nitride | d. | potassium nitrogen
oxide |
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11.
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Which of the following pairs of elements is most likely to form an ionic
compound?
a. | magnesium and fluorine | b. | nitrogen and sulfur | c. | oxygen and
chlorine | d. | sodium and aluminum |
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12.
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Ionic compounds are normally in which physical state at room temperature?
a. | solid | c. | gas | b. | liquid | d. | plasma |
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13.
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Which of the following is true about the melting temperature of potassium
chloride?
a. | The melting temperature is relatively high. | b. | The melting
temperature is variable and unpredictable. | c. | The melting temperature is relatively
low. | d. | Potassium chloride does not melt. |
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14.
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What does the term coordination number in ionic crystals refer to?
a. | the total number of valence electrons in an atom | b. | the number of
oppositely charged ions surrounding a particular ion | c. | the number of atoms in a particular formula
unit | d. | the number of like-charged ions surrounding a particular
ion |
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15.
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Under what conditions can potassium bromide conduct electricity?
a. | only when melted | b. | only when dissolved | c. | only when it is in
crystal form | d. | only when melted or dissolved in water |
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16.
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Which of the following is NOT a characteristic of most ionic compounds?
a. | They are solids. | b. | They have low melting
points. | c. | When melted, they conduct an electric current. | d. | They are composed of
metallic and nonmetallic elements. |
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17.
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Which of the following particles are free to drift in metals?
a. | protons | c. | neutrons | b. | electrons | d. | cations |
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18.
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What is the basis of a metallic bond?
a. | the attraction of metal ions to mobile electrons | b. | the attraction
between neutral metal atoms | c. | the neutralization of protons by
electrons | d. | the attraction of oppositely charged ions |
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19.
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What characteristic of metals makes them good electrical conductors?
a. | They have mobile valence electrons. | b. | They have mobile protons. | c. | They have mobile
cations. | d. | Their crystal structures can be rearranged easily. |
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20.
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An ionic bond is a bond between ____.
a. | a cation and an anion | c. | the ions of two different metals | b. | valence electrons
and cations | d. | the ions of two
different nonmetals |
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21.
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A metallic bond is a bond between ____.
a. | the ions of two different metals | c. | valence electrons and
cations | b. | a cation and an anion | d. | the ions of two different nonmetals |
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22.
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In a hexagonal close-packed crystal, every atom (except those on the surface)
has ____ neighbors.
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23.
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In a body-centered cubic crystal, every atom (except those on the surface) has
____ neighbors.
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24.
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In a face-centered cubic crystal, every atom (except those on the surface) has
____ neighbors.
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25.
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Which metallic crystal structure has a coordination number of 8?
a. | body-centered cubic | c. | hexagonal close-packing | b. | face-centered
cubic | d. | tetragonal |
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