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a.

Complete the sentences to describe nuclear fusion:

  • Nuclear fusion is the process where two light atomic ___________ join to form a heavier one.
  • During this process, the total mass of the resulting particles is ___________ than the total mass of the starting reactant particles because some mass is converted into energy.
[2]
b.

To initiate fusion in the laboratory, a gas must be heated to extreme temperatures. Calculate the energy required to increase the temperature of 8.0 g8.0\text{ g}8.0 g of tritium gas by 60 000 000 ∘C60\ 000\ 000\ ^\circ\text{C}60 000 000 ∘C.

  • Specific heat capacity of tritium gas = 4500 J/kg ∘C4500\text{ J/kg }^\circ\text{C}4500 J/kg ∘C.

Give your answer in scientific notation.

[3]
c.

Scientists use computer simulations and small-scale prototype models of fusion reactors before attempting to build commercial fusion power stations. Suggest two reasons why testing models is important.

[2]
d.

Unlike fossil fuel power stations, operational nuclear fusion reactors would produce no greenhouse gas emissions. Explain one harmful environmental impact associated with burning fossil fuels to generate electricity.

[2]

Nuclear fission and fusion (physics only) Questions

Practise AQA GCSE Physics Nuclear fission and fusion (physics only) with exam-style questions for Foundation and Higher tier. 10 questions covering Nuclear fission and Nuclear fusion, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Nuclear fission and fusion (physics only) Questions

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