What are isotopes?
Atoms of the same element with different numbers of electrons
Atoms of the same element with different numbers of protons
Atoms of the same element with different numbers of neutrons
What is the role of the moderator in a nuclear fission reactor?
To slow down the fast neutrons produced by the nuclear fission process
To control the fast neutrons produced by the nuclear fission process
To speed up the fast neutrons produced by the nuclear fission process
What is released when a neutron hits a uranium nucleus in nuclear fission?
Daughter nuclei and two or three further neutrons
Daughter nuclei and one neutron
Daughter nuclei and two or three further electrons
How many neutrons does hydrogen-3 have?
2
1
0
What is the main fuel used in a nuclear reactor?
Thorium-231
Uranium-235
Uranium-238
What is the role of the control rods inside a nuclear reactor?
To slow down the neutrons
To speed up the neutrons
To absorb the neutrons
What type of radioactive waste is mixed with concrete and put in a stainless steel drum in a purpose-built store?
High
Intermediate
Low
What can induce nuclear fission in certain nuclei?
The absorption of slow neutrons
The emission of slow neutrons
The absorption of fast-moving neutrons
What is the charge of a neutron?
1+
1-
What sort of reaction has happened when a hydrogen-3 atom becomes a helium-3 atom?
Chemical reaction
Nuclear reaction
Ionic reaction