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HSC Physics

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  1. Module 5: Advanced Mechanics
    5.1 Projectile Motion
  2. 5.2 Circular Motion
  3. 5.3 Motion in Gravitational Fields
    2 Topics
  4. Module 6: Electromagnetism
    6.1 Charged Particles, Conductors and Electric and Magnetic Fields
  5. 6.2 The Motor Effect
    1 Topic
  6. 6.3 Electromagnetic Induction
  7. 6.4 Applications of the Motor Effect
    1 Topic
  8. Module 7: The Nature of Light
    7.1 Electromagnetic Spectrum
    3 Topics
  9. 7.2 Light: Wave Model
  10. 7.3 Light: Quantum Model
    2 Topics
  11. 7.4 Light and Special Relativity
  12. Module 8: From the Universe to the Atom
    8.1 Origins of the Elements
    5 Topics
  13. 8.2 Structure of the Atom
    3 Topics
  14. 8.3 Quantum Mechanical Nature of the Atom
    2 Topics
  15. 8.4 Properties of the Nucleus
    2 Topics
  16. 8.5 Deep Inside the Atom
    4 Topics

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  • Michael
HSC Physics 8.2 Structure of the Atom Atomic Models
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Lesson 13, Topic 3
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Atomic Models

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An overview of the most significant developments in the model of the atom.

Limitations of Rutherford & Bohr’s Models

Rutherford

  • No explanation for why electrons remain in orbit around the nucleus
  • Electrons have a definite, circular orbit
  • Did not explain how protons were held together in the nucleus without repelling each other due to their positive charge
  • Made no attempt to explain spectral lines

Bohr

  • Model only works for hydrogen
  • Moving electrons should emit electromagnetic radiation (according to Maxwell), hence should also emit energy and collapse into the nucleus
  • Violates the Heisenberg Uncertainty Principle, as electrons have both known radius and orbit