Modified True/False
Indicate
whether the sentence or statement is true or false. If false, change the identified word or
phrase to make the sentence or statement true.
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1.
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If
heated past ultraviolet radiation, black bodies will emit X rays.
_________________________
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2.
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Light
energy can be emitted in a continuous spectrum. _________________________
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3.
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Energy is emitted by a constant times a multiple of the minimum frequency.
_________________________
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4.
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The
wave-particle duality explains that light cannot be a wave or a particle.
__________________________________________________
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5.
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Electrically excited gases will only give off light in discrete spectrum lines.
_________________________
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6.
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The
energy levels of hydrogen are distributed evenly with the interval distances becoming smaller.
______________________________
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7.
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Heisenberg’s uncertainty principle states that we cannot know both the
position and the momentum of a particle at the same time. _________________________
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8.
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The
strong nuclear force is made up of binding energy. _________________________
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9.
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The
mass of a nucleus is always equal to the sum of the neutron and proton masses.
_________________________
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10.
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A
neutrino has a large mass. _________________________
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11.
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All
radiation emissions, a, b, and g, transmutate an element.
_________________________
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12.
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A
gamma ray is essentially a very high energy photon. _________________________
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13.
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The
radiation of any sample will eventually go to zero.
_______________________________________________________
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14.
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The
higher the number of unstable nuclei, the higher the activity of radiation.
_________________________
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15.
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The
p meson, or pion,
was originally thought to be responsible for the strong nuclear force, but current thought is that
gluons are the force carriers for the strong nuclear force. _________________________
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Completion
Complete each sentence or
statement.
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16.
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Energy radiates from an atom in bundles called ____________________.
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17.
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Electrons that leave a surface after being struck by light are called
____________________.
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18.
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The
minimum frequency of light at which electrons are released from a surface is called the
____________________ frequency.
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19.
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The
amount of energy needed to release an electron is called the ____________________.
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20.
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The
scattering of photons and electrons by high energy photons is due to the
____________________.
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21.
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A
photon can be destroyed, creating an electron and a positron in a process called
____________________.
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22.
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As
light passes through a gas, lines of colour are removed creating a(n)
_________________________.
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23.
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The
smallest energy that an atom can absorb is the ____________________ energy.
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24.
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The
energy required to remove an electron is the ____________________ energy.
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25.
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The
excited atoms of a phosphorescent material remain in a ____________________ state.
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26.
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Light
that is polarized, travelling in the same direction, and in phase is called ____________________
light.
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27.
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Wavelengths of light created from a higher energy state to the ground state are found
in the ____________________ series.
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28.
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The
changing from one element into a different element by radioactive decay is called
____________________.
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29.
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The
newly-formed nucleus in a radioactive decay is the _________________________.
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30.
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The
radioactive decay that releases a helium nuclei is a(n) ____________________ decay.
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31.
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A
decay that involves a high speed electron is a(n) ____________________ decay.
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32.
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The
time required to reduce radioactivity by 50% is the ____________________.
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33.
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Electromagnetic repulsion between two electrons is a result of a
____________________.
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34.
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The
weak nuclear force was needed to explain ____________________ decays.
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35.
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The
first meson to be discovered was the ____________________.
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Matching
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Match the definition or phrase below with the best available word, equation, or
phrase. a. | first excitation
energy | f. | ionization
energy | b. | phosphorescence | g. | light as both a wave and a particle | c. | continuous
spectrum | h. | Coulomb’s
law | d. | de Broglie
wavelength | i. | fluorescence | e. | ground state | j. | emission spectrum | | | | |
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36.
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wave-particle duality
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37.
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38.
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39.
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light
of all wavelengths
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40.
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light
with characteristic frequencies
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41.
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lowest energy state of an atom
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42.
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smallest amount of energy that can be absorbed
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43.
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energy required to remove an electron from an atom
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44.
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when
a source of light is removed, this light stops
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45.
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when
a source of light is removed, this light will continue
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Match the following symbol or description to the definitions
below. a. | g | f. | | b. | holds the nucleus together | g. | pair production | c. | becquerel | h. | | d. | energy to separate protons and
neutrons | i. | holds electrons
inside nucleons | e. | | j. | | | | | |
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46.
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a
particle
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47.
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b
particle
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48.
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g
ray
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49.
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positron
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50.
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neutrino
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51.
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strong nuclear force
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52.
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weak
nuclear force
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53.
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binding energy
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54.
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photon creating an electron and a positron
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55.
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SI
unit for radioactivity
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Short Answer
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56.
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Mercury has an excitation energy level at 4.9 eV. Why did Franck and Hertz detect a
drop in current at the 9.8 eV level when electrons with 9.8 eV of kinetic energy collided with
mercury atoms?
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57.
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Write
the nuclear equation for the a decay of  .
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58.
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Complete the following equation:  .
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59.
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Complete the following nuclear equation: 
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60.
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Which
force carrier is responsible for the b decay of a photon into a neutron?
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61.
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What
are the two subclasses of hadrons?
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62.
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Is
the  arrangement of quarks possible?
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63.
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Could
the  pattern of quarks possibly produce a fictitious
Micmac baryon particle?
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64.
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How
many quarks are present in a baryon?
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65.
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What
colours would the quarks in an antiomega 
have?
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Problem
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66.
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Calculate the energy of light with wavelength 486 nm. Give your answer in joules and
in electron volts.
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67.
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A
wavelength of 431 nm is detected from a line spectrum. What change in energy level does this line
represent if it is related to the ground state. Give your answer in electron volts..
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68.
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Two
spectral lines of wavelength 192 nm and 532 nm are emitted from the first and second energy levels to
the ground state. What wavelength of photon would be emitted from the second to the first energy
level?
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69.
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What
wavelength of photon could excite an electron from the third to the fifth energy state of
hydrogen?
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70.
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What
speed will an a particle have when ejected if  decays to  ? (Assume that only the a particle
moves.)
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71.
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In
the Chernobyl nuclear accident,  was released and
distributed in a cloud over Northern Europe. If a sample in Norway was found to have an activity of
50 kBq a few days after the accident, what would the activity be 20 years after the accident?
(t1/2 = 28.5a)
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72.
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Calculate the charge to mass ratio  of a particle
travelling with a speed of 3.28 ´ 106 m/s and having a charge of 1.602 ´
10–19 C in a magnetic field of 3.50 ´ 10–3 T, and that produces a radius of
curvature of 5.346 ´ 10–3 m. Identify the particle from its
mass.
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73.
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What
radius would a proton produce in a magnetic field of 0.0086 T with a speed of 3.488 ´ 104
m/s?
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