Learning objective
Describe atoms using protons, neutrons and electrons.
Read the explanation, check the common trap, then practise with flashcards and questions.
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Topic
Particles
Subtopic
Constituents of the atom
Aqa A Level PhysicsParticles and radiation
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Quick explanation
Describe atoms using protons, neutrons and electrons
- This point belongs to Particles, especially Constituents of the atom.
- You need to be able to describe atoms using protons, neutrons and electrons.
- The key ideas to know are neutron, electron, and proton.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
neutronelectronproton
Why it matters
This objective helps connect Constituents of the atom to exam-style questions, flashcards, and revision notes for Particles.
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Open revision notesRelated learning objectives
- Determine proton, neutron and electron numbers for atoms and ions.
Constituents of the atom
- Explain isotopes using neutron number.
Constituents of the atom
- Calculate or compare specific charge for particles and nuclei.
Constituents of the atom
- Explain why some nuclei are unstable.
Stable and unstable nuclei
- Distinguish alpha, beta and gamma radiation by nature, charge and penetration.
Stable and unstable nuclei