Nuclear Fission

Topic 4 - Atomic Structure
Written by Atheridge Tuition
 

AQA-style Exam Question

Describe the process of nuclear fission.

[4 marks]

  • The uranium-235 nucleus absorbs a neutron, causing it to become unstable.

    (1 mark)

Uranium-235 nucleus absorbing a neutron and becoming unstable during nuclear fission.
 

  • The unstable nucleus splits into two smaller nuclei.

    (1 mark)

Unstable uranium-235 nucleus splitting into two smaller nuclei during nuclear fission.
 

  • Two or three neutrons and gamma rays are released.

    (2 marks)

Nuclear fission diagram showing a uranium nucleus splitting and releasing two or three neutrons.
 
Nuclear fission diagram showing two smaller nuclei, neutrons and gamma rays released from a uranium nucleus.
 

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Nuclear Fission
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