Matching
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Match each item with the correct statement below. a. | atomic emission
spectrum | d. | photon | b. | frequency | e. | quantum | c. | wavelength | f. | spectrum | | | | |
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1.
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discrete bundle of electromagnetic energy
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2.
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energy needed to move an electron from one energy level to another
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3.
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number of wave cycles passing a point per unit of time
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4.
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distance between wave crests
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5.
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separation of light into different wavelengths
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6.
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frequencies of light emitted by an element
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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7.
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Which
color of visible light has the shortest wavelength? a. | yellow | c. | blue | b. | green | d. | violet | | | | |
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8.
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How
are the frequency and wavelength of light related? a. | They are
inversely proportional to each other. | b. | Frequency equals wavelength divided by the speed of
light. | c. | Wavelength is determined by dividing frequency by the speed of
light. | d. | They are directly proportional to each
other. | | |
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9.
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What
is the wavelength of an electromagnetic wave that travels at 3 
10 m/s and has a frequency of 60 MHz? (1 MHz =
1,000,000 Hz) a. | | b. | 60 MHz  300,000,000
m/s | c. | | d. | No answer can be determined from the information
given. | | |
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10.
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The
light given off by an electric discharge through sodium vapor is ____. a. | a continuous
spectrum | c. | of a single
wavelength | b. | an emission spectrum | d. | white light | | | | |
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11.
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Emission of light from an atom occurs when an electron ____. a. | drops from a
higher to a lower energy level | b. | jumps from a lower to a higher energy
level | c. | moves within its atomic orbital | d. | falls into the
nucleus | | |
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12.
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The
atomic emission spectra of a sodium atom on Earth and of a sodium atom in the sun would be
____. a. | the
same | b. | different from
each other | c. | the same as those of several other
elements | d. | the same as each other only in the ultraviolet
range | | |
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13.
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What
is the approximate energy of a photon having a frequency of 4 
10 Hz? (h = 6.6 
10 J s)
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14.
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What
is the approximate frequency of a photon having an energy 5  10 J? (h = 6.6 
10 J s)
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15.
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Which
variable is directly proportional to frequency? a. | wavelength | c. | position | b. | velocity | d. | energy | | | | |
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16.
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What
are quanta of light called? a. | charms | c. | muons | b. | excitons | d. | photons | | | | |
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Short Answer
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17.
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What
is the frequency of ultraviolet light with wavelength 2.94  10 m? (c = 3.00 
10 m/s)
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18.
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What
is the wavelength of gamma ray electromagnetic radiation with a frequency of 2.73  10 Hz? (c = 3.00 
10 m/s)
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19.
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What
is the frequency of a radar photon with energy 6.80  10 J? (h = 6.63 
10 J s)
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20.
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What
is the energy of a microwave photon that has a frequency of 1.12 
10 Hz? (h = 6.63 
10 J s)
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Essay
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21.
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What
is the explanation for the discrete lines in atomic emission spectra?
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