Complete the sentence by putting a cross (×) in the box next to your answer - Edexcel - GCSE Physics - Question 2 - 2016 - Paper 1
Question 2
Complete the sentence by putting a cross (×) in the box next to your answer.
The difference between fission and fusion is that only fission
A) creates new nuclei
B)... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (×) 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 purpose of the moderator in a nuclear fission reactor is to slow down the fast neutrons produced during fission reactions. Slower neutrons are more likely to cause further fission reactions in uranium-235, increasing the efficiency of the reactor and allowing a sustained chain reaction.
