Edexcel GCSE Physics · 1PH0
Specification 6.38P · Paper 1
Revise: Fission of U-235In induced fission of U-235, the process begins when its nucleus absorbs a neutron.
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GCSE Physics · key term
A particular form of uranium whose nucleus contains 92 protons and 143 neutrons, giving a mass number of 235.
Used by Edexcel
Specification 6.38P · Paper 1
Revise: Fission of U-235In induced fission of U-235, the process begins when its nucleus absorbs a neutron.
Describe the complete sequence: a U-235 nucleus absorbs a neutron, becomes unstable, then splits into two daughter nuclei while emitting two or more neutrons and releasing energy.
Do not say that U-235 splits into two equal halves. The two daughter nuclei are smaller, but they need not have equal mass numbers.
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