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Structure of Atom

Maharashtra Board · Class 11 · Chemistry

Complete topic list for Structure of Atom in Maharashtra Board Class 11 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.

45 questions20 flashcards5 concepts

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4 Topics · Maharashtra Board Class 11 Chemistry

Topics in Structure of Atom

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

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?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall 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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