Nuclear fission (Edexcel GCSE Physics Combined Science): Flashcards
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Definition of nuclear fission
Definition of nuclear fission
Unstable nucleus splits into two smaller nuclei
Products when nucleus undergoes fission
Products when nucleus undergoes fission
Two smaller nuclei of different elements
Energy form of fission products
Energy form of fission products
Kinetic energy
Number of neutrons produced in fission
Number of neutrons produced in fission
Two or three neutrons
Chain reaction in nuclear fission
Chain reaction in nuclear fission
Neutrons from fission cause more nuclei to split, continuing the process
Energy released as radiation in fission
Energy released as radiation in fission
Gamma rays
Use of gamma rays in nuclear power stations
Use of gamma rays in nuclear power stations
Heat water to produce steam for turbines and electricity
How chain reactions are controlled in reactors
How chain reactions are controlled in reactors
Control rods
Function of control rods
Function of control rods
Absorb neutrons
Effect of lowering control rods
Effect of lowering control rods
Slows down the chain reaction
Result of uncontrolled chain reaction
Result of uncontrolled chain reaction
Huge energy release in an explosion (nuclear weapons)
What nucleus must absorb to undergo fission
What nucleus must absorb to undergo fission
A neutron
Element used in nuclear fission
Element used in nuclear fission
Uranium
Rate of uncontrolled chain reaction
Rate of uncontrolled chain reaction
Exponential rate