Learning objective

Explain why alpha radiation is strongly ionising but weakly penetrating.

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

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At a glance

Flashcards

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Topic

Atoms and nuclear radiation

Subtopic

Radioactive decay and nuclear radiation

AQA GCSE PhysicsAtomic structure

Study support

Understand this objective

Short explanation

Within Radioactive decay and nuclear radiation, this learning objective asks you to explain why alpha radiation is strongly ionising but weakly penetrating. Focus on the approved ideas alpha radiation 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

alpha radiationionising power

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

Alpha Radiation Characteristics: To fix this, remember that alpha radiation is strongly ionising due to its mass and charge, but it is weakly penetrating because it can be stopped by a sheet of paper or even the outer layer of human skin.

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