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1)
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Element X has three naturally occurring isotopes. The masses (amu) and %
abundances of the isotopes are given in the table below. The average atomic mass of the element is
__________ amu. Isotope | Abundance | Mass | 38X | 5.07 | 37.919 | 39X | 15.35 | 39.017 | 42X | 79.85 | 42.111 | | | |
A) | 41.54 | B) | 39.68 | C) | 39.07 | D) | 38.64 | E) | 33.33 |
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2)
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A molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is
a statement of __________.
A) | the law of multiple proportions | B) | the law of constant
composition | C) | the law of conservation of mass | D) | the law of conservation of
energy | E) | none of the above |
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3)
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The charge on an electron was determined in the __________.
A) | cathode ray tube, by J. J. Thompson | B) | Rutherford gold foil
experiment | C) | Millikan oil drop experiment | D) | Dalton atomic theory | E) | atomic theory of
matter |
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4)
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__________-rays consist of fast-moving electrons.
A) | Alpha | B) | Beta | C) | Gamma | D) | X | E) | none of the
above |
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5)
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The gold foil experiment performed in Rutherford's lab __________.
A) | confirmed the plum-pudding model of the atom | B) | led to the discovery
of the atomic nucleus | C) | was the basis for Thomson's model of the
atom | D) | utilized the deflection of beta particles by gold foil | E) | proved the law of
multiple proportions |
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6)
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Cathode rays are __________.
A) | neutrons | B) | x-rays | C) | electrons | D) | protons | E) | atoms |
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7)
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Cathode rays are deflected away from a negatively charged plate because
__________.
A) | they are not particles | B) | they are positively charged
particles | C) | they are neutral particles | D) | they are negatively charged
particles | E) | they are emitted by all matter |
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8)
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Of the three types of radioactivity characterized by Rutherford, which is/are
electrically charged?
A) | b-rays | B) | a-rays and b-rays | C) | a-rays, b-rays, and g-rays | D) | a-rays | E) | a-rays and g-rays |
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9)
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Of the three types of radioactivity characterized by Rutherford, which is/are
not electrically charged?
A) | b-rays | B) | a-rays, b-rays, and g-rays | C) | g-rays | D) | a-rays and b-rays | E) | a-rays and g-rays |
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10)
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Of the following, the smallest and lightest subatomic particle is the
__________.
A) | neutron | B) | proton | C) | electron | D) | nucleus | E) | alpha
particle |
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11)
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All atoms of a given element have the same __________.
A) | mass | B) | number of protons | C) | number of
neutrons | D) | number of electrons and neutrons | E) | density |
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12)
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There are __________ electrons, __________ protons, and __________ neutrons in
an atom of  . A) | 132, 132, 54 | B) | 54, 54, 132 | C) | 78, 78,
54 | D) | 54, 54, 78 | E) | 78, 78, 132 |
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13)
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Which isotope has 45 neutrons?
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14)
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Which pair of atoms constitutes a pair of isotopes of the same element?
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15)
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Which isotope has 36 electrons in an atom?
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16)
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Different isotopes of a particular element contain different numbers of
__________.
A) | protons | B) | neutrons | C) | protons and
neutrons | D) | protons, neutrons, and electrons | E) | None of the above is
correct. |
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17)
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The atomic mass unit is presently based on assigning an exact integral mass (in
amu) to an isotope of __________.
A) | hydrogen | B) | oxygen | C) | sodium | D) | carbon | E) | helium |
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18)
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The average atomic weight of copper, which has two naturally occurring isotopes,
is 63.5. One of the isotopes has an atomic weight of 62.9 amu and constitutes 69.1% of the copper
isotopes. The other isotope has an abundance of 30.9%. The atomic weight (amu) of the second isotope
is __________ amu.
A) | 63.2 | B) | 63.8 | C) | 64.1 | D) | 64.8 | E) | 28.1 |
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19)
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Which pair of elements would you expect to exhibit the greatest similarity in
their physical and chemical properties?
A) | H, Li | B) | Cs, Ba | C) | Ca,
Sr | D) | Ga, Ge | E) | C, O |
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20)
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The elements in groups 1A, 6A, and 7A are called, __________,
respectively.
A) | alkaline earth metals, halogens, and chalcogens | B) | alkali metals,
chalcogens, and halogens | C) | alkali metals, halogens, and noble
gases | D) | alkaline earth metals, transition metals, and halogens | E) | halogens, transition
metals, and alkali metals |
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21)
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An element in the upper right corner of the periodic table __________.
A) | is either a metal or metalloid | B) | is definitely a metal | C) | is either a
metalloid or a non-metal | D) | is definitely a non-metal | E) | is definitely a
metalloid |
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22)
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An element that appears in the lower left corner of the periodic table is
__________.
A) | either a metal or metalloid | B) | definitely a metal | C) | either a metalloid
or a non-metal | D) | definitely a non-metal | E) | definitely a
metalloid |
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23)
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Of the choices below, which one is not an ionic compound?
A) | PCl5 | B) | MoCl6 | C) | RbCl | D) | PbCI2 | E) | NaCl |
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24)
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Which type of formula provides the most information about a compound?
A) | empirical | B) | molecular | C) | simplest | D) | structural | E) | chemical |
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25)
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An empirical formula always indicates __________.
A) | which atoms are attached to which in a molecule | B) | how many of each
atom are in a molecule | C) | the simplest whole-number ratio of different
atoms in a compound | D) | the isotope of each element in a
compound | E) | the geometry of a molecule |
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26)
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Of the following, __________ contains the greatest number of electrons.
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27)
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Which one of the following is most likely to lose electrons when forming an
ion?
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28)
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Which of the following compounds would you expect to be ionic?
A) | SF6 | B) | H2O | C) | H2O2 | D) | NH3 | E) | CaO |
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29)
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Which pair of elements is most apt to form an ionic compound with each
other?
A) | barium, bromine | B) | calcium, sodium | C) | oxygen,
fluorine | D) | sulfur, fluorine | E) | nitrogen,
hydrogen |
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30)
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Which species below is the nitride ion?
A) | Na+ | B) | NO3- | C) | NO2- | D) | NH4+ | E) | N3- |
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31)
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Which species below is the nitrate ion?
A) | NO2- | B) | NH4+ | C) | NO3- | D) | N3- | E) | N3- |
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32)
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Barium reacts with a polyatomic ion to form a compound with the general formula
Ba3(X)2. What would be the most likely formula for the compound formed between
sodium and the polyatomic ion X?
A) | NaX | B) | Na2X | C) | Na2X2 | D) | Na3X | E) | Na3X2 |
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33)
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The charge on the copper ion in the salt CuO is __________.
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34)
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Which formula/name pair is incorrect?
A) | Mn(NO2)4
manganese(II) nitrite | B) | Mg(NO3)2
magnesium nitrate | C) | Mn(NO3)2
manganese(II) nitrate | D) | Mg3N2
magnesium nitrite | E) | Mg(MnO4)2
magnesium permanganate |
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35)
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Which one of the following is the formula of hydrochloric acid?
A) | HClO3 | B) | HClO4 | C) | HClO | D) | HCl | E) | HClO2 |
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36)
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The suffix -ide is used primarily __________.
A) | for monatomic anion names | B) | for polyatomic cation names | C) | for the name of the
first element in a molecular compound | D) | to indicate binary acids | E) | for monoatomic
cations |
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37)
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Which one of the following compounds is chromium(III) oxide?
A) | Cr2O3 | B) | CrO3 | C) | Cr3O2 | D) | Cr3O | E) | Cr2O4 |
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38)
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A correct name for Fe(NO3)2 is __________.
A) | iron nitrite | B) | ferrous nitrite | C) | ferrous
nitrate | D) | ferric nitrite | E) | ferric nitrate |
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39)
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Which element forms an ion with the same charge as the sulfate ion?
A) | magnesium | B) | copper | C) | iron | D) | phosphorus | E) | oxygen |
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40)
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What is the molecular formula for 1-propanol?
A) | CH3OH | B) | C2H5OH | C) | C3H7OH | D) | C4H9OH | E) | C5H11OH |
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41)
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In the periodic table, the rows are called __________ and the columns are called
__________.
A) | octaves, groups | B) | staffs, families | C) | periods,
groups | D) | cogeners, families | E) | rows, groups |
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42)
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Vertical columns of the periodic table are known as __________.
A) | metals | B) | periods | C) | nonmetals | D) | groups | E) | metalloids |
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43)
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Elements in Group 1A are known as the __________.
A) | chalcogens | B) | alkaline earth metals | C) | alkali
metals | D) | halogens | E) | noble gases |
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44)
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Elements in Group 2A are known as the __________.
A) | alkaline earth metals | B) | alkali metals | C) | chalcogens | D) | halogens | E) | noble
gases |
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45)
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The empirical formula of a compound with molecules containing 12 carbon atoms,
14 hydrogen atoms, and 6 oxygen atoms is __________.
A) | C12H14O6 | B) | CHO | C) | CH2O | D) | C6
H7O3 | E) | C2H4O |
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46)
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Predict the empirical formula of the ionic compound that forms from magnesium
and oxygen.
A) | Mg2O | B) | MgO | C) | MgO2 | D) | Mg2O2 | E) | Mg3O2 |
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47)
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The correct name for CCl4 is __________.
A) | carbon chloride | B) | carbon tetrachlorate | C) | carbon
perchlorate | D) | carbon tetrachloride | E) | carbon chlorate |
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48)
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The correct name for N2O5 is __________.
A) | nitrous oxide | B) | nitrogen pentoxide | C) | dinitrogen
pentoxide | D) | nitric oxide | E) | nitrogen oxide |
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49)
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The correct name for HClO is __________.
A) | hydrochloric acid | B) | perchloric acid | C) | chloric
acid | D) | chlorous acid | E) | hypochlorous
acid |
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50)
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Iron and chlorine form an ionic compound whose formula is FeCl3. The
name of this compound is __________.
A) | iron chlorine | B) | iron (III) chloride | C) | moniron
trichloride | D) | iron (III) trichloride | E) | ferric
trichloride |
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