What happens to the atom after it absorbs a neutron?

The atom becomes unstable and decays into two smaller atoms releasing more neutrons and energy

In a nuclear reactor, water is used as a moderator. What is a moderator?

A substance which speeds up a nuclear reaction

A substance which slows down the fission neutrons

A substance which slows down the production of electricity

A substance that absorbs surplus neutrons

What is nuclear fission?

It is the process by which stars generate light and heat

Fission is the splitting of an atomic nucleus creating two smaller atomic nuclei

Fission is the fusion of two atoms to create a heavier atom

Fission is the process by which electrons are removed from an element

In nuclear power stations, a chain reaction is required. What is a chain reaction?

Reactions in which one reaction causes further reactions, which cause further reactions etc.

Reactions in which when the first reaction has occurred others are prevented

Reactions in which when a certain number of reactions have occurred others are prevented

Reactions which will never stop

What happens to the excess neutrons?

They decay into protons and electrons

They are absorbed by other atoms creating more atoms to split into smaller atoms

They bond with other free neutrons to create a large neutron mass

What is an advantage of nuclear fission?

It creates radioactive material

A low percentage of energy is output compared to energy input into the process

A large amount of fissionable material is needed

A small amount of fissionable material is needed

What is a disadvantage of nuclear fission?

A large amount of fissionable material is needed

It produces vast amounts of energy

Nuclear power plants are cheap to build

GCSEPhysics★★ Medium

GCSE Physics Radioactivity - Nuclear Fission Quiz

Revise nuclear fission processes, chain reactions, and energy production in this GCSE Physics quiz. Learn about isotopes, reactors, and control systems.

Written by Dr. Olivia BennettReviewed by Dr. Chloe EdwardsUpdated 17 Mar 2026

Quizzes and Guides GCSE Physics

Overview

- Improve speed
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Quiz details

Topic: Radioactivity Nuclear Fission

Questions: 10

Duration: 10 min

Difficulty: ★★ Medium

Focus: selecting the right Radioactivity Nuclear Fission model, formula and units under time pressure.

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Common mistakes to catch early

Wrong unit conversion
Formula chosen from the wrong topic
No method marks from skipped steps

Quick answers

What does this quiz measure?

It measures applied accuracy in radioactivity nuclear fission, not just definition recall.

What should I do after a low score?

Fix one error category first, then retake before moving to the next related quiz.

What is the best next step?

Use more Physics quizzes to widen coverage, then switch to GCSE Physics revision topics before full-paper timing.

Description

Revise nuclear fission processes, chain reactions, and energy production in this GCSE Physics quiz. Learn about isotopes, reactors, and control systems.

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Quiz FAQ

How should I use this GCSE Physics Radioactivity - Nuclear Fission Quiz?

Complete the quiz once under normal timing, review every mistake, then return to the Physics subject page to try a related quiz while the topic is still fresh.

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Use your score as a signal. If the result is strong, move to another Physics quiz for wider coverage. If the result is weak, repeat practice in the same subject before switching topics.

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