CAPE Physics Unit 2 · 2007 · Paper 1 · Question Q40

The diagram represents the relationship between binding energy per nucleon and mass number. W, X, Y and Z are different elements. Which of the following statements is true of nuclear stability?

1. (A)Z could undergo nuclear fission to become more stable.
2. (B)W and X could undergo nuclear fission to become more stable.
3. (C)W and Y could undergo nuclear fusion to become more stable.
4. (D)Z could undergo nuclear fusion to become more stable.

This question uses a figure or table from the paper — you'll see it when you practise.