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What is the main difference between nuclear fusion and nuclear fission?

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Question: What is the main difference between nuclear fusion and nuclear fission?

Options:

  1. Fusion combines nuclei, fission splits them
  2. Fusion splits nuclei, fission combines them
  3. Fusion occurs in stars, fission occurs in reactors
  4. Both are the same process

Correct Answer: Fusion combines nuclei, fission splits them

Solution: 

The main difference is that nuclear fusion combines light nuclei to form a heavier nucleus, while nuclear fission splits a heavy nucleus into lighter nuclei.

What is the main difference between nuclear fusion and nuclear fission?

Practice Questions

Q1
What is the main difference between nuclear fusion and nuclear fission?
  1. Fusion combines nuclei, fission splits them
  2. Fusion splits nuclei, fission combines them
  3. Fusion occurs in stars, fission occurs in reactors
  4. Both are the same process

Questions & Step-by-Step Solutions

What is the main difference between nuclear fusion and nuclear fission?
Correct Answer: Nuclear fusion combines light nuclei, while nuclear fission splits heavy nuclei.
  • Step 1: Understand that nuclear fusion is a process where two light atomic nuclei come together to form one heavier nucleus.
  • Step 2: Recognize that nuclear fission is a process where one heavy atomic nucleus splits into two or more lighter nuclei.
  • Step 3: Remember that fusion releases energy when the light nuclei combine, while fission releases energy when the heavy nucleus splits.
  • Step 4: Note that fusion occurs in stars, like the sun, while fission is used in nuclear power plants and atomic bombs.
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