Learning objective

Explain why isotopes of the same element have the same chemical properties.

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 isotopes

Subtopic

Mass number, atomic number and isotopes

AQA GCSE PhysicsAtomic structure

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Understand this objective

Short explanation

Within Mass number, atomic number and isotopes, this learning objective asks you to explain why isotopes of the same element have the same chemical properties. Focus on the approved ideas isotope and connect them clearly to Atoms and isotopes. 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

isotopechemical properties

Why it matters

This objective helps connect Mass number, atomic number and isotopes to exam-style questions, flashcards, and revision notes for Atoms and isotopes.

Common mistakes

1 linked

Misconception about chemical properties of isotopes: Explain that chemical properties are determined by the arrangement of electrons, which is the same for all isotopes of an element. Neutrons only affect the mass and nuclear stability, not the electron configuration or chemical behaviour.

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