Matching
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Match each item with the correct statement below. a. | proton | d. | electron | b. | nucleus | e. | neutron | c. | atom |
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1.
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the smallest particle of an element that retains the properties of that
element
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2.
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a positively charged subatomic particle
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3.
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a negatively charged subatomic particle
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4.
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a subatomic particle with no charge
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5.
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the central part of an atom, containing protons and neutrons
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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Who was the man who lived from 460B.C.–370B.C. and was among the first to
suggest the idea of atoms?
a. | Atomos | c. | Democritus | b. | Dalton | d. | Thomson |
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7.
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Which of the following was NOT among Democritus’s ideas?
a. | Matter consists of tiny particles called atoms. | b. | Atoms are
indivisible. | c. | Atoms retain their identity in a chemical reaction. | d. | Atoms are
indestructible. |
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8.
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The smallest particle of an element that retains the properties of that element
is a(n) ____.
a. | atom | c. | proton | b. | electron | d. | neutron |
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9.
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Dalton's atomic theory included which idea?
a. | All atoms of all elements are the same size. | b. | Atoms of different
elements always combine in one-to-one ratios. | c. | Atoms of the same element are always
identical. | d. | Individual atoms can be seen with a microscope. |
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10.
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Which of the following is NOT a part of Dalton's atomic theory?
a. | All elements are composed of atoms. | b. | Atoms are always in motion. | c. | Atoms of the same
element are identical. | d. | Atoms that combine do so in simple whole-number
ratios. |
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11.
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Which of the following was originally a tenet of Dalton's atomic theory,
but had to be revised about a century ago?
a. | Atoms are tiny indivisible particles. | b. | Atoms of the same element are
identical. | c. | Compounds are made by combining atoms. | d. | Atoms of different elements can combine with
one another in simple whole number ratios. |
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12.
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The comparison of the number of atoms in a copper coin the size of a penny with
the number of people on Earth is made to illustrate which of the following?
a. | that atoms are indivisible | b. | that atoms are very small | c. | that atoms are very
large | d. | that in a copper penny, there is one atom for every person on
Earth |
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13.
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The range in size of most atomic radii is approximately ____.
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14.
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Dalton hypothesized that atoms are indivisible and that all atoms of an element
are identical. It is now known that ____.
a. | all of Dalton's hypotheses are correct | b. | atoms of an element
can have different numbers of protons | c. | atoms are divisible | d. | all atoms of an
element are not identical but they must all have the same mass |
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15.
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Why did J. J. Thomson reason that electrons must be a part of the atoms of all
elements?
a. | Cathode rays are negatively-charged particles. | b. | Cathode rays can be
deflected by magnets. | c. | An electron is 2000 times lighter than a
hydrogen atom. | d. | Charge-to-mass ratio of electrons was the same, regardless of the gas
used. |
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16.
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Which of the following is true about subatomic particles?
a. | Electrons are negatively charged and are the heaviest subatomic
particle. | b. | Protons are positively charged and the lightest subatomic
particle. | c. | Neutrons have no charge and are the lightest subatomic particle. | d. | The mass of a
neutron nearly equals the mass of a proton. |
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17.
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Who conducted experiments to determine the quantity of charge carried by an
electron?
a. | Rutherford | c. | Dalton | b. | Millikan | d. | Thomson |
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18.
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What is the relative mass of an electron?
a. | 1/1840 the mass of a hydrogen atom | c. | 1/1840 the mass of a C-12
atom | b. | 1/1840 the mass of a neutron + proton | d. | 1/1840 the mass of an alpha
particle |
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19.
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Which hypothesis led to the discovery of the proton?
a. | When a neutral hydrogen atom loses an electron, a positively-charged particle should
remain. | b. | A proton should be 1840 times heavier than an electron. | c. | Cathode rays should
be attracted to a positively-charged plate. | d. | The nucleus of an atom should contain
neutrons. |
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20.
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Which of the following is correct concerning subatomic particles?
a. | The electron was discovered by Goldstein in 1886. | b. | The neutron was
discovered by Chadwick in 1932. | c. | The proton was discovered by Thomson in
1880. | d. | Cathode rays were found to be made of protons. |
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21.
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All atoms are ____.
a. | positively charged, with the number of protons exceeding the number of
electrons | b. | negatively charged, with the number of electrons exceeding the number of
protons | c. | neutral, with the number of protons equaling the number of
electrons | d. | neutral, with the number of protons equaling the number of electrons, which is equal
to the number of neutrons |
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22.
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The particles that are found in the nucleus of an atom are ____.
a. | neutrons and electrons | c. | protons and neutrons | b. | electrons only | d. | protons and
electrons |
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23.
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As a consequence of the discovery of the nucleus by Rutherford, which model of
the atom is thought to be true?
a. | Protons, electrons, and neutrons are evenly distributed throughout the volume of the
atom. | b. | The nucleus is made of protons, electrons, and neutrons. | c. | Electrons are
distributed around the nucleus and occupy almost all the volume of the atom. | d. | The nucleus is made
of electrons and protons. |
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24.
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The nucleus of an atom is ____.
a. | the central core and is composed of protons and neutrons | b. | positively charged
and has more protons than neutrons | c. | negatively charged and has a high
density | d. | negatively charged and has a low density |
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25.
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The atomic number of an element is the total number of which particles in the
nucleus?
a. | neutrons | c. | electrons | b. | protons | d. | protons and
electrons |
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Numeric Response
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26.
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What is the relative charge carried by an electron?
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27.
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What is the relative charge of a proton?
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28.
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About how many more times massive is a proton than an electron?
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29.
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Use the periodic table to determine the number of electrons in a neutral atom of
lithium.
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30.
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Use the periodic table to determine the number of protons in an atom of
barium.
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