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WorksheetsNuclear energy
Total questions: 65
Worksheet time: 57mins
The splitting of a nucleus into smaller nuclei is
Fusion
Fission
Half-life
gamma -radiation
Name the moderator used in the nuclear reactor?
Plutonium
Thorium
Graphite
Berilium
Which isotope of Uranium has the capacity to sustain the chain reaction?
U-230
U-235
U-245
U-225
Which of the following atomic particles have the least mass?
Proton
Electron
Deuteron
Neutron
During an atomic explosion, the energy released is due to
Conversion of protons to neutrons
Conversion of chemical energy into heat energy
Conversion of mechanical energy into nuclear energy
Conversion of mass into energy
What is the beneficial aspect of nuclear fission?
The ability to absorb energy
The ability to produce more energy than nuclear fusion
The ability to release tremendous amounts of energy
There are no beneficial aspects of nuclear fission
When a neutron leaves the nucleus, it’s mass
Triples
Decreases
Increases
Stays the same
The release in energy in nuclear fission is consistent with the fact that uranium has
More mass per nucleon than either of the two fragments
more mass per nucleon as the two fragment
exactly the same mass per nucleon as the two fragments
Less mass per nucleon than either of the two fragments
he energy we get in nuclear reaction comes from
Energy we put into the reactor
The mass of the fuel
Water
The sun
Which best represents nuclear fission?
F
G
H
J
Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?
A
B
C
D
A high temperature is required for which to occur?
alpha decay
beta decay
nuclear fission
nuclear fusion
During nuclear fission, a nucleus _________.
grows
divides
shrinks
combines with another
In the Sun, hydrogen atoms fuse together to form _________.
helium
mercury
oxygen
nitrogen
Nuclear fission of uranium-235 can start a chain reaction by
releasing enough thermal energy to start nuclear fission in neighboring atoms
producing two smaller atoms that can then strike and split neighboring atoms
producing neutrons that can then strike and split neighboring atoms
combining two atoms with low mass to form one large atom
What type of nuclear reaction is shown?
fusion
fission
chain reaction
alpha radiation
Why is nuclear fusion considered safer than nuclear fission?
Fusion takes energy to be sustained so you can stop the reaction by taking away energy.
Fusion is a chain reaction that must be controlled or it will go out of control.
Fission takes energy to be sustained so you can stop the reaction by taking away energy.
They are equally unsafe.
Nuclear fission occurs when an atom, such as uranium, releases energy when it splits when subjected to which subatomic particle?
Proton
Neutron
Electron
Positron
Our Sun, an average star in the galaxy, uses the process of fusion to produce its energy. Every second, the Sun converts 600 million tons of matter into--
gravitational forces
carbon dioxide and water
electromagnetic energy
radioactive materials
Each second within the Sun, 600 million tons of matter are converted into--
electromagnetic energy
lithium and carbon atoms
gravitational force
universal dark matter
Which of the following best describes how nuclear reactions are used to generate electricity?
Nuclei produced in reactions generate electromagnetic waves.
Heat from fission is used to produce steam, which drives a turbine.
Splitting nuclei give up their electrons, when they flow through wires.
Light from fission is captured by photocells, which produce electricity.
Scientists have continuously been searching for ways to create a system for energy production through fusion reactions but have been unsuccessful. Which of the following explains why it is still not a practical source of power?
Fusion can create a huge amount of energy with very little fuel.
Fusion radioactive byproducts have a shorter half-life than fission byproducts.
Fusion requires a large amount of energy to force atoms to initially fuse together.
Fusion reactions have virtually little to no risk of nuclear accidents.
Carbon dating is a process where scientists evaluate the percentage of Carbon-14 atoms that have decayed into Carbon-12. The process of changing Carbon-14 into Carbon-12 involves the atoms losing two neutrons.
What type of reaction occurs when Carbon-14 changes to Carbon-12?
Decomposition
Single replacement
Fusion
Fission
The best capable alternative source which can meet the future energy demand is _____________
thermal power plant
nuclear power plant
hydroelectric power plant
geothermal power plant
Which nuclear fuel is usually used in thermal nuclear reactor to create fission?
U234
U235
U236
U237
Which parts function is to reduce the energy of fast neutrons to thermal neutrons in nuclear power plant?
Moderator
Coolant circulator
Control rods
Shielding
What is used in nuclear reactor as a cooling method/device?
Coolant
Water jackets
Air cooler
Air vents
Control rods are made of __________
Cesium
Cadmium
Tin
Gallium
The nuclear energy is measured as........
MeV
MW
Curie
None of the above
What is a problem commonly associated with nuclear power facilities?
A small quantity of energy is produced.
Reaction products contribute to acid rain
It is impossible to control nuclear fission.
It is difficult to dispose of wastes.
One benefit of nuclear fission reactions is
nuclear reactor meltdowns
storage of waste materials
biological exposure
production of energy
Which components of a fission reactor are used to slow neutrons during a fission reaction?
moderators
shields
coolants
control rods
Which substance can be used as both a coolant and a moderator in a nuclear reactor?
graphite
carbon dioxide
heavy water
helium
The main function of a coolant in a nuclear fission reactor is to
slow down the speed of the neutrons
absorb energy produced by the reaction
shield the wall of the reactor from radiation damage
adjust the number of neutrons available for reaction
Control rods in nuclear reactors are commonly made of boron and cadmium because these two elements have the ability to
absorb neutrons
emit neutrons
decrease the speed of neutrons
increase the speed of neutrons
The operation of a commercial nuclear reactor requires an isotope that will undergo
fission and a controlled chain reaction
fission and an uncontrolled chain reaction
fusion and a controlled chain reaction
fusion and an uncontrolled chain reaction
The purpose of the high-density concrete used in some nuclear reactors is to
shield the reactor walls from radiation damage
shield the reactor personnel from radiation exposure
control the rate of the nuclear reaction
control the speed of the neutrons
Nuclear Power Plants have many advantages. One of those advantages is...
nuclear weapons
nuclear waste
reduced CO2 emissions
reactor meltdowns
Nuclear Fission relies on starting and maintaining a ___
Continuous force
A chain reaction
A spinning turbine
A waterfall
Nuclear reactors make heat, which warms water into steam, which turns a _______
Waterwheel
Windmill
Hydroelectric Plant
Turbine
What is a redox reaction?
A reaction where both reactants get reduced.
A reaction where both reactants get oxidized.
A reaction that involves a transfer of electrons between reactants.
A reaction that involves the combustion of at least one reactant.
What is reduction?
It is the gain of electrons.
It is the loss of electrons.
It is the creation of electrons.
It is the destruction of electrons.
What is oxidation?
It is the gain of electrons.
It is the loss of electrons.
It is the creation of electrons.
It is the destruction of electrons.
What is a reducing agent?
It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that destroys electrons.
What is a galvanic (voltaic) cell?
It is a cell that destroys electrons on one side and creates electrons on the other side.
It is a cell that contains only one metal bar and one aqueous ion solution.
It is a type of battery that drives a redox reaction when electricity is applied.
It is a type of battery that generates an electrical current from redox reactions.
What happens to hydrogen molecules in a hydrogen-oxygen fuel cell?
They form hydrogen ions, H+ , and electrons, e-
They form hydrogen ions, H+ , and electrons, e+
They form hydrogen atoms, H
What happens to oxygen molecules in a hydrogen-oxygen fuel cell?
They react with electrons to form oxide ions, O2-
They react with hydrogen ions to form hydroxide ions, OH-
They react with hydrogen ions and electrons to form water
The ___________ fuel cell uses potassium hydroxide as the electrolyte.
Solid Oxide
Phosphoric Acid
Alkaline
Polymer Exchange Membrane
CH4(g) + 2H2O(l) → CO2(g) + 8H+(aq) + 8e-
The corresponding equation for the half-reaction at the cathode is
