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Structure of Atom

Maharashtra Board · Class 11 · Chemistry

Quick revision notes for Structure of Atom — Maharashtra Board Class 11 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

45 questions20 flashcards5 concepts

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Key Topics to Revise

1

Subatomic Particles and Their Discovery

  • Three fundamental subatomic particles: electron (e⁻), proton (p⁺), and neutron (n⁰)
  • J.J. Thomson discovered electron in 1897 through cathode ray tube experiment
  • Ernest Rutherford discovered proton in 1911 through α-particle scattering experiment
2

Isotopes, Isobars, and Isotones

  • Isotopes: Same atomic number, different mass numbers (same element, different neutrons)
  • Isobars: Same mass number, different atomic numbers (different elements)
  • Isotones: Same number of neutrons, different atomic and mass numbers
3

Atomic Models and Their Limitations

  • Rutherford's nuclear model: Electrons revolve around dense, positively charged nucleus
  • Limitations: Cannot explain atomic stability and line spectra
  • According to classical physics, revolving electrons should emit energy and spiral into nucleus
4

Electromagnetic Radiation and Wave-Particle Duality

  • Electromagnetic radiation shows dual nature: wave and particle properties
  • Wave properties: wavelength (λ), frequency (ν), amplitude, speed of light (c)
  • Particle properties: energy of photons depends on frequency, not amplitude

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Full Notes

Key Concepts

Three fundamental particles were discoveredAtomic number (Z) equals the numberIsotopesFour key postulatesLight exhibits dual nature

Frequently Asked Questions

What are the important topics in Structure of Atom for Maharashtra Board Class 11 Chemistry?
Structure of Atom covers several key topics that are frequently asked in Maharashtra Board Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Structure of Atom — Maharashtra Board Class 11 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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