Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The
forces that hold different atoms or ions together are
a. electric
currents. b. chemical bonds. c. physical bonds.
d. nuclear forces.
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2.
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A
mixture is different from a compound because each substance in a mixture
a. retains
its own properties. b. changes its electric charge. c. forms an
ion. d. changes from a solid to a liquid.
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3.
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A
compound differs from a mixture because it
a. always
remains frozen even at high temperatures. b. is formed from two cations.
c. always contains the same elements in the same proportion. d. can form only
in the presence of heat energy.
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4.
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Each
molecule of hydrochloric acid, HCl, contains one atom of hydrogen and
a. one atom
of chlorine. b. one atom of oxygen. c. two atoms of
chlorine. d. two atoms of oxygen.
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5.
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Each
molecule of table sugar, C12H22O11,
contains
a. 0 atoms of carbon. b. 1 atom of
carbon. c. 6 atoms of carbon. d. 12 atoms of carbon.
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6.
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Which
compound is formed from a tight network of oppositely charged ions?
a. sugar,
C12H22O11 b. quartz, SiO2
c. water, H2O d. salt, NaCl
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7.
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In
which substance do the molecules have the strongest attractions to one
another?
a. sugar, a solid b. hydrogen, a gas
c. sulfuric acid, a liquid d. water, a liquid
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8.
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Gases
take up a lot of space because
a. they have weak chemical bonds.
b. their molecules have very little attraction for one another. c. they contain
very few atoms. d. they have a small molar mass.
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9.
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Often
atoms join so that each atom will have
a. an even
number of electrons. b. an outermost energy level that is full of
electrons. c. an equal number of protons and electrons. d. more
electrons than either protons or neutrons.
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10.
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The
bonds that hold atoms together behave most like
a. snap-together blocks. b. glue. c. rubber
cement. d. flexible springs.
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11.
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When
two hydrogen atoms bond, the positive nucleus of one atom attracts the
a. negative
nucleus of the other atom. b. positive electron of the other atom.
c. negative electron of the other atom. d. positive nucleus of the other
atom.
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12.
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An
ionic bond is a bond that forms between
a. ions
with opposite charges. b. atoms with neutral charges. c. one atom's
nucleus and another atom's electrons. d. the electrons of two different
atoms.
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13.
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Covalent bonds are formed between
a. ions. b. metal atoms. c. nonmetal
atoms. d. compounds.
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14.
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In a
metallic bond, the nucleus of one atom is attracted by a nearby atom's
a. nucleus. b. negative ion. c. energy
structure. d. electrons.
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15.
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Copper is a good conductor of electricity because its
electrons
a. are positively charged. b. are free to move
from atom to atom. c. can take on either positive or negative charges.
d. are shared between neighboring compounds.
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16.
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Solid
ionic compounds have very high melting points because they
a. are
positively charged. b. contain metallic elements. c. are made of
elements that are solid at room temperature. d. contain charged ions that are locked
tightly together.
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17.
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In
which type of bond do atoms share electrons?
a. covalent
bonds b. metallic bonds c. ionic bonds
d. polyatomic bonds
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18.
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The
anion formed from an oxygen atom is called a(n)
a. oxygen
ion. b. oxide ion. c. carbon dioxide. d. nitrous
oxide.
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19.
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The
name dinitrogen tetroxide tells you that this compound
contains
a. two nitrogen atoms and two oxygen atoms.
b. four nitrogen atoms and two oxygen atoms. c. two nitrogen atoms and four
oxygen atoms. d. four nitrogen atoms and four oxygen atoms.
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20.
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Fe2O3 is named iron(III) oxide because it
contains
a. three oxygen atoms. b. Fe3+
ions. c. three iron atoms. d. O3+ ions.
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21.
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When
copper combines with oxygen to form copper(II) oxide, the charge of the copper ion
is
a. Cu1+. b. Cu2+.
c. Cu3+. d. Cu4+.
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22.
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When
nickel combines with fluorine to form nickel(III) fluoride, the charge of the nickel ion
is
a. Ni1+. b. Ni2+.
c. Ni3+. d. Ni4+.
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23.
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The
name for the compound with the formula CuBr2 would be written
as
a. copper(II) bromide. b. copper(I) bromide.
c. copper bromine. d. copper(III) bromide.
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24.
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The
name for the compound with the formula Cr2O3 would be written
as
a. chromium(I) oxide. b. chromium(II) oxide.
c. chromium oxygen. d. chromium(III) oxide.
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25.
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It is
possible for different covalent compounds to have the same empirical formula because empirical
formulas represent
a. a total of all ionic bonds. b. only the
cations in the compound. c. a model of the compound. d. a ratio of
atoms in the compound.
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26.
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Formaldehyde, CH2O, and acetic acid,
C2H4O2, have the same empirical formula but
different
a. kinds of cations. b. kinds of
anions. c. kinds of atoms. d. molecular formulas.
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27.
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A
carbon atom can bond to four other atoms because it has
a. four
different cations. b. four valence electrons. c. two inner energy
levels. d. no protons in its nucleus.
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28.
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The
simplest organic compound is
a. aspirin. b. table
sugar. c. salt. d. methane.
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29.
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Alkanes are hydrocarbons that contain
a. single
covalent bonds only. b. single or double covalent bonds. c. carbon
and oxygen only. d. carbon, hydrogen, and oxygen.
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30.
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Alcohols are organic compounds that contain
a. carbon
and oxygen only. b. carbon and hydrogen only. c. carbon, oxygen,
and hydrogen. d. carbon, nitrogen, and hydrogen.
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31.
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Polymers are large organic molecules that are made of
a. cations. b. anions. c. carbon and oxygen
only. d. repeating units.
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32.
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Which
compounds have carbon-carbon double bonds?
a. alkanes b. alkenes c. alcohols
d. ionic compounds
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33.
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A
protein is a polymer that is made of
a. simple sugars. b. nitrogen
and carbon dioxide. c. amino acids. d. DNA.
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34.
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The
"rungs" of the DNA "ladder" are made up of
a. paired
monomers. b. sugar molecules. c. phosphates.
d. amino acids.
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35.
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Some
polymers are elastic because they are made of
a. carbon. b. phosphate ladders. c. sugar and
alcohol. d. cross-linked chains.
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