Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2016 - Paper 1
Question 2
Complete the sentence by putting a cross (X) in the box next to your answer.
The difference between fission and fusion is that only fission
A
B
C
D
A nucleus of u... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2016 - Paper 1
Step 1
Complete the sentence
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Answer
The difference between fission and fusion is that only fission B is triggered by neutrons.
Step 2
Insert the correct numbers into the sentence
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Answer
A nucleus of uranium-235 contains 92 protons and 143 neutrons.
Step 3
Describe the purpose of the moderator in a nuclear fission reactor
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Answer
The moderator in a nuclear fission reactor serves to slow down the neutrons produced during fission. By reducing the speed of these neutrons, the moderator increases the likelihood of them colliding with and causing fission in nearby uranium nuclei, thereby sustaining the chain reaction necessary for the reactor to function efficiently.
