Constituents of the Atom | A-Level Physics

Full lesson notes, worked examples and revision resources: https://inklearning.co.uk/physics/par... Learn how protons, neutrons and electrons determine an atom's identity, mass and charge. This A-level Physics lesson covers: • the charge and mass of protons, neutrons and electrons in SI and relative units • proton number Z, nucleon number A and standard nuclide notation • how to find the numbers of protons, neutrons and electrons • the difference between isotopes and ions • specific charge, Q divided by m, for particles, nuclei and ions • worked calculations for a carbon-12 nucleus and an aluminium-27 three-plus ion • common exam mistakes and useful checks on calculated answers Practise this topic with 19 original exam-style questions and mark schemes: https://inklearning.co.uk/physics/pra... Revise with free A-level Physics flashcards: https://inklearning.co.uk/physics/fla... Continue to stable and unstable nuclei: https://inklearning.co.uk/physics/par... Chapters 00:00 What determines an atom's identity? 00:20 A simple model of the atom 00:36 Protons, neutrons and electrons 01:36 Nuclide notation: A and Z 02:12 Helium-4 example 02:34 Isotopes and ions 03:08 What isotopic data reveals 03:34 Specific charge 04:40 Carbon-12 nucleus example 05:28 Aluminium-27 ion example 06:26 Identity, mass and charge 06:51 Next: stable and unstable nuclei Suitable for students following AQA, Pearson Edexcel, OCR A and Cambridge International AS or A-level Physics. InkPhysics is an independent study resource and is not affiliated with or endorsed by any examination board. #ALevelPhysics #AtomicStructure #InkPhysics