Physics · Unit 1 · Ionising radiation and nuclear reactions · Nuclear model and stability

Explain a fission chain reaction.

AI-marked practice questions tied to QCAA mark schemes for this exact LO. Free to start.

Practice questions for this objective

Full questions, answers and worked solutions unlock when you start a free practice session.

Question 1

What key feature sustains a fission chain reaction in uranium-235?

Worked answer

🔒 Start free to see full answer

Question 2

What condition is essential for a fission chain reaction to be self-sustaining?

Worked answer

🔒 Start free to see full answer

Question 3

The diagram shows a sequence of uranium-235 fission events. What feature of this process enables the chain reaction to continue?

Worked answer

🔒 Start free to see full answer