Lesson 4.1.1.3

4.1.1.3 The development of the model of the atom (common content with physics) Quiz: AQA Chemistry, Unit 1

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 4.1.1.3, The development of the model of the atom (common content with physics): 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 1: Atomic structure and the periodic table, written with Revision Ninja.

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The 20 questions

  1. What did the discovery of the electron directly lead to?

    • Plum pudding model
    • Nuclear model
    • Bohr model
    • Quantum model

  2. How are electrons arranged in the plum pudding model?

    • Orbiting central nucleus
    • Outside the atom entirely
    • Embedded in positive charge
    • In discrete energy shells

  3. Where did the alpha particle scattering experiment show mass is concentrated?

    • Spread evenly throughout
    • Outside the atom
    • In the nucleus
    • In the electrons

  4. Which model replaced the plum pudding model following scattering experiments?

    • Nuclear model
    • Quantum model
    • Solid sphere model
    • Bohr model

  5. What did Niels Bohr propose about electron positions?

    • Orbit at specific distances
    • Random positions everywhere
    • Stationary on the surface
    • Fixed inside the nucleus

  6. What name was given to the positive charge units in a nucleus?

    • Protons
    • Alpha particles
    • Neutrons
    • Electrons

  7. Which scientist's experimental work provided evidence for neutrons?

    • Dmitri Mendeleev
    • James Chadwick
    • J J Thomson
    • Niels Bohr

  8. Roughly how long after the nucleus became accepted did evidence for neutrons appear?

    • About 20 years
    • About 50 years
    • About 100 years
    • About 2 years

  9. What causes a scientific model to be changed or replaced over time?

    • Theoretical guesswork
    • A lack of funding
    • New experimental evidence
    • Popular public opinion

  10. Which evidence proved the plum pudding model incorrect?

    • Alpha particle scattering
    • Electron discovery
    • Gas pressure tests
    • Electrolysis results

  11. What did the alpha particle scattering experiment prove about the atom?

    • Solid positive sphere
    • Evenly spread mass
    • Central nucleus
    • Neutrons in shells

  12. How were atoms viewed before electrons were discovered?

    • Plum pudding
    • Indivisible spheres
    • Nuclear models
    • Hollow spheres

  13. Which subatomic particle was discovered first, leading to the plum pudding model?

    • Nucleus
    • Electron
    • Neutron
    • Proton

  14. What was Bohr's key adaptation to the nuclear model?

    • Positive sphere
    • Neutron discovery
    • Fixed electron orbits
    • Random electron cloud

  15. Which subatomic particle's presence in the nucleus was shown by Chadwick?

    • Alpha particle
    • Electron
    • Positron
    • Neutron

  16. Why was Bohr's atomic model classed as an adaptation?

    • It removed all electrons
    • It added solid spheres
    • It deleted the proton
    • It kept the nucleus

  17. What does a subdivided positive charge in the nucleus imply?

    • Whole number units
    • Continuous spread
    • Zero mass
    • Negative balance

  18. Where is the positive charge concentrated according to the scattering experiment?

    • Outer shells
    • Central nucleus
    • Spread evenly
    • Between electrons

  19. How is a scientific model tested?

    • Through historical texts
    • Against experimental evidence
    • Using pure theory
    • By popular vote

  20. Which model sequence is in correct chronological order?

    • Sphere, plum pudding, nuclear
    • Plum pudding, sphere, nuclear
    • Nuclear, plum pudding, sphere
    • Nuclear, sphere, plum pudding

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