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WorksheetsNuclear Reactions
Total questions: 10
Worksheet time: 5mins
What is meant by nuclear energy?
nuclear reaction in which small and light nuclei fuse to form a heavier nucleus while releasing a large amount of energy
atomic energy, released during nuclear reactions such as radioactive decay, nuclear fission and nuclear fusion
nuclear reaction when a heavy nucleus splits into two or more lighter nuclei while releasing a large amount of energy
the time taken for a sample of radioactive nuclei to decay to half of its initial number
What causes a substance to be radioactive?
an unstable nucleus
elements with an atomic number above 125
substance decays over time
contaminated sewage
When a heavy nucleus splits into two or more lighter nuclei, releasing a tremendous amount of energy. What is the name of this reaction?
Nuclear fusion
Nuclear fission
What are the optimal conditions for nuclear fusion to occur?
High volume
Low velocity
Extremely high temperature and pressure
High mass defect
A chain reaction takes place because
the energy released during the nuclear reaction is very high
the process is uncontrolled
heavy nucleus is highly radioactive
the number of neutrons released is continuously multiplying as time increases
How does the Sun provide the Earth with light and heat energy?
Radioactive radiations
Half-life
Nuclear fusion
Nuclear fission
What distinguishes nuclear fusion from nuclear fission?
Nuclear fusion does not produce energy, whereas nuclear fission does
The result of nuclear fusion is a larger atomic nucleus
Nuclear fission does not produce energy, whereas nuclear fusion does
The result of nuclear fission is a bigger atomic nucleus
Where does nuclear fission take place?
Nuclear reactor
Battery
Dam
Lightning
Nuclear reactions involve changes to the nucleus of an atom. This includes
protons
electrons
neutrons
Why is nuclear fusion regarded as a safer alternative to nuclear fission?
They are equally unsafe
Fusion is a chain reaction that must be kept under control or it will become uncontrollable
Fission requires energy to continue, so we can halt it by removing energy
Fusion has no chain reaction involved
