Learning objective

Interpret isotope notation using atomic number and mass number.

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

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At a glance

Flashcards

Questions

Topic

Atoms and isotopes

Subtopic

Mass number, atomic number and isotopes

AQA GCSE PhysicsAtomic structure

Study support

Understand this objective

Short explanation

Within Mass number, atomic number and isotopes, this learning objective asks you to interpret isotope notation using atomic number and mass number. Focus on the approved ideas isotope, mass number, atomic number 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

isotopemass number

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

Misunderstanding Isotope Notation: To fix this, remember that the atomic number (Z) represents the number of protons, while the mass number (A) is the total number of protons and neutrons. Practice interpreting isotope notation by clearly distinguishing between these two numbers.

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