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 most
penetrating type of radiation is the ____. a. | alpha particle | c. | gamma ray | b. | beta particle | d. | uranium | | | | |
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2.
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One type of
radioactive device that indicates the intensity of radiation with a clicking sound that increases in
frequency as more radiation is present is a(n) ____. a. | bubble
chamber | c. | electroscope | b. | cloud chamber | d. | Geiger counter | | | | |
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3.
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Negatively
charged particles emitted from a nucleus at a high speed are ____. a. | alpha
particles | c. | gamma
rays | b. | beta
particles | d. | X
rays | | | | |
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4.
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The three
types of nuclear radiation in increasing order of penetrating power are ____. a. | alpha, beta,
gamma | c. | X ray, beta,
gamma | b. | alpha, gamma, beta | d. | X ray, gamma, beta | | | | |
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5.
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The
stability of an isotope nucleus depends on the ____. a. | atomic
mass | c. | number of
neutrons | b. | atomic number | d. | neutron-to-proton ratio | | | | |
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6.
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Neutrons
released in a fission reaction can strike other nuclei and cause ____. a. | a chain
reaction | c. | fusion
reactions | b. | an electron avalanche | d. | radioactive decay | | | | |
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7.
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Thorium-234
has a half-life of 24 days. If you started with a 100-g sample of thorium-234, how much would remain
after 48 days? a. | 100
g | c. | 25
g | b. | 50
g | d. | 10
g | | | | |
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8.
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Which of the
following elements is most likely to be produced during a nuclear fusion reaction in the
Sun? a. | helium-4 | c. | uranium-235 | b. | hydrogen-1 | d. | uranium-238 | | | | |
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9.
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When an
electroscope is given a(n) ____, its leaves repel each other and spread apart. a. | moving
particle | c. | negative
charge | b. | radioactive sample | d. | positive charge | | | | |
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10.
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If a source
of radiation is placed near ____ cells, atoms in the cells can be ionized and can die or stop
growing. a. | thyroid | c. | heart | b. | fat | d. | cancer | | | | |
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