Learning objective

Explain that radioactive decay changes the nucleus of an atom.

Read the explanation, check the common trap, then practise with flashcards and questions.

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At a glance

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Topic

Atoms and nuclear radiation

Subtopic

Radioactive decay and nuclear radiation

AQA GCSE PhysicsAtomic structure

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Understand this objective

Short explanation

Within Radioactive decay and nuclear radiation, this learning objective asks you to explain that radioactive decay changes the nucleus of an atom. Focus on the approved ideas radioactive decay and connect them clearly to Atoms and nuclear radiation. A strong response should state the relevant particle, radiation, isotope, decay, half-life or nuclear-equation idea, then explain how it answers the exact command word. Avoid swapping nearby concepts such as atomic number and mass number, isotope and ion, alpha, beta and gamma radiation, or contamination and irradiation.

Key concepts

radioactive decaynucleus change

Why it matters

This objective helps connect Radioactive decay and nuclear radiation to exam-style questions, flashcards, and revision notes for Atoms and nuclear radiation.

Common mistakes

1 linked

Misunderstanding Radioactive Decay: Emphasize that radioactive decay is a random process, and while the half-life can be estimated for a large sample, the exact moment of decay for an individual nucleus cannot be predicted.

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