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1.
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Carbon is able to bond with other elements in many different ways because it
has
A. | six protons. | B. | four electrons. | C. | six valence
electrons. | D. | four valence electrons. |
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2.
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How many chemical bonds can each carbon atom form?
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3.
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Which form of pure carbon is so hard that it can be used in cutting
tools?
A. | diamond | B. | graphite | C. | hydrocarbon | D. | fullerene |
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4.
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Which form of pure carbon is formed of layers that slide past each other?
A. | diamond | B. | graphite | C. | fullerene | D. | isomer |
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5.
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Compounds that contain only the elements carbon and hydrogen are called
A. | carbon chains. | B. | hydrocarbons. | C. | isomers. | D. | esters. |
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6.
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What can you tell about methane (CH4) from its molecular
formula?
A. | It contains four carbon atoms. | B. | It contains one hydrogen
atom. | C. | It contains four hydrogen atoms. | D. | It forms groups of four
molecules. |
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7.
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Which compounds have the same molecular formula but different structural
formulas?
A. | hydrocarbons | B. | isomers | C. | organic
compounds | D. | polymers |
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8.
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Which of these compounds has the maximum possible number of hydrogen atoms on
its carbon chain?
A. | a hydrocarbon with double bonds | B. | a hydrocarbon with triple
bonds | C. | a saturated hydrocarbon | D. | an unsaturated
hydrocarbon |
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9.
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The name pentane suggests that this hydrocarbon has
A. | single bonds. | B. | double bonds. | C. | double and triple
bonds | D. | monomers. |
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10.
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How many hydrogens does a molecule of methane contain?
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11.
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If a hydrocarbon chain has the maximum number of hydrogens possible, we say that
it is
A. | concentrated. | B. | condense. | C. | unsaturated. | D. | saturated. |
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12.
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Which of the following are considered pure forms of carbon? (Select all that
apply).
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Use these figures to answer the questions that follow. 
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13.
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Which of these four organic molecules has a ring shape?
A. | Figure A | B. | Figure B | C. | Figure
C | D. | Figure D |
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14.
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Which of the four organic molecules is unsaturated? (Select all that
apply).
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15.
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Figure B represents a hydrocarbon with which shape?
A. | ring | B. | fullerene | C. | straight
chain | D. | branched chain |
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16.
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These figures above are known as
A. | molecular formulas. | B. | structural formulas. | C. | isomeric
formulas. | D. | carbonic formulas. |
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17.
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The additional piece of information that these types of figures provide
about the elements of the compounds they represent, that molecular formulas do not, is
A. | the kind of elements. | B. | the number of atoms of each
element. | C. | the arrangement of the atoms. | D. | the color of the
crystals. |
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18.
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A hydrocarbon chain containing 4 carbons in a chain with only single bonds would
be called
A. | methane. | B. | butane. | C. | butene. | D. | propane. |
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19.
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The elements carbon (C) and hydrogen (H) form bonds in a huge variety of
combinations. Examples include methane (CH 4), propane, (C 3H 8), and
octane, (C 8H 18), each of which has covalent bonds. These substances are
____.  A. | molecules | B. | elements | C. | polyatomic
ions | D. | isotopes |
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20.
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All of the molecules pictured above are _________ which have __________
bonds.
A. | alkanes, double | B. | alkenes, single | C. | alkynes,
triple | D. | alkanes, single |
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21.
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Describe graphite and diamond. Explain why these substances are so different
even though both of them are pure forms of carbon.
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22.
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Explain why more compounds can be made from carbon than from other
elements.
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23.
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Which of these compounds could be changed into alkenes by the addition of a
double bond? (Select all that apply).
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A. | 1 Carbon | G. | 7 Carbons | B. | 2 Carbons | H. | 8 Carbons | C. | 3
Carbons | I. | contains all single
bonds | D. | 4 Carbons | J. | contains a triple bond | E. | 5 Carbons | K. | contains a double bond | F. | 6
Carbons |
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24.
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METH-
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25.
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PROP-
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26.
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HEX-
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27.
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PENT-
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28.
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OCT-
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29.
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BUT-
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30.
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ETH-
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31.
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HEPT-
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32.
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-YNE
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33.
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-ANE
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34.
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-ENE
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35.
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Carbon is able to bond with itself to take on many shapes including (choose
all that apply):
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36.
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Fullerenes, including buckyballs, were a disappointing discovery because
scientists couldn’t see anything useful that could be made from them.
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37.
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Buckyballs are made from carbon atoms that arrange themselves in pentagon and
octagon shapes.
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38.
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“Nanotechnology” came about largely because of the discovery of
buckyballs and other fullerene structures.
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39.
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In an experiment, the variable that changes as a result of changes in the
manipulated variable is the
A. | hypothesis. | B. | controlled variable. | C. | responding
variable. | D. | inferred variable. |
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40.
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One example of a physical change is
A. | burning paper. | B. | baking cookies. | C. | the rusting of
iron. | D. | mixing a milkshake. |
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41.
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One example of a chemical change is
A. | cutting up paper. | B. | burning gasoline in an
engine. | C. | boiling water. | D. | crushing a can. |
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42.
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Which state of matter undergoes changes in volume most easily?
A. | solid | B. | liquid | C. | gas | D. | frozen |
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43.
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The amount of space that a gas takes up is its
A. | volume. | B. | mass. | C. | pressure. | D. | density. |
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44.
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Which of these particles has a positive charge?
A. | atom | B. | proton | C. | neutron | D. | electron |
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45.
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What is a double bond?
A. | a bond between two atoms | B. | one pair of electrons shared between two
atoms | C. | two pairs of electrons shared between two atoms | D. | two pairs of
electrons shared between four atoms |
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46.
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A reaction that absorbs energy in the form of heat is described as
A. | endothermic. | B. | exothermic. | C. | combustion. | D. | unbalanced. |
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47.
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A liquid mixture in which particles can be seen and easily separated by settling
or filtration is a
A. | solution. | B. | suspension. | C. | solvent. | D. | colloid. |
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48.
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In a carbon to carbon bond, valence eletrons are
A. | transferred. | B. | shared. | C. | gained. | D. | lost. |
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49.
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What is another name for carbon compounds?
A. | carbohydrates | B. | hydrocarbons | C. | fullerenes | D. | organic
compounds |
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50.
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How many valence electrons does an atom of hydrogen have?
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