Skip to main content
Super TutorResources
Chapter 7 of 41
Syllabus

Atomic Structure — Syllabus

Telangana Open School (TOSS) · Class 12 · Chemistry

What Atomic Structure covers in Telangana Open School (TOSS) Class 12 Chemistry: 4 topics, for the 2026-27 session.

44 questions30 flashcards10 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Atomic Structure? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for syllabus and more.

Try Super Tutor — Free

Free trial, no card needed.

4 Topics · Telangana Open School (TOSS) Class 12 Chemistry · 2026-27

Topics in Atomic Structure

1

Fundamental Particles of the Atom

  • Atoms are composed of three fundamental subatomic particles: electrons, protons, and neutrons.
  • Electrons are negatively charged, very light particles found outside the nucleus.
  • Protons are positively charged and located in the nucleus; they are approximately 1840 times heavier than electrons.
2

Evolution of Atomic Models

  • J.J. Thomson proposed the 'plum pudding model' where electrons are embedded in a positively charged sphere.
  • Rutherford's alpha-particle scattering experiment showed that most of the atom is empty space with a dense, positively charged nucleus at the center.
  • Most alpha particles passed straight through the gold foil, some were deflected slightly, and a very few bounced back, indicating a concentrated positive charge.
3

Electromagnetic Radiation and Spectra

  • Electromagnetic radiation (EMR) consists of oscillating electric and magnetic fields that travel through space at the speed of light (3 × 10⁸ m/s).
  • EMR does not require a medium and includes visible light, radio waves, X-rays, etc.
  • Key parameters: wavelength (λ), frequency (ν), wave number (ν̄), amplitude, and velocity (c = νλ).
4

Bohr's Model of the Atom

  • Bohr proposed that electrons revolve in fixed circular orbits (stationary states) without radiating energy.
  • Electrons can jump between orbits by absorbing or emitting photons of energy ΔE = hν.
  • Angular momentum is quantized: mvr = nh/(2π), where n is the principal quantum number.

Key Concepts

Central concept: Atomic Structure

Fundamental ParticlesAtomic ModelsElectromagnetic RadiationLine Spectrum of HydrogenBohr's ModelWave-Particle DualityHeisenberg's Uncertainty PrincipleQuantum Mechanical Model

Work through every topic in Atomic Structure with notes and quizzes

Start This Chapter

Frequently Asked Questions

What are the important topics in Atomic Structure for Telangana Open School (TOSS) Class 12 Chemistry?
Key topics in Atomic Structure include Fundamental Particles of the Atom, Evolution of Atomic Models, Electromagnetic Radiation and Spectra, Bohr's Model of the Atom. Study these first, then practise questions on each for the Telangana Open School (TOSS) Class 12 board exam.
How should I revise Atomic Structure for the Telangana Open School (TOSS) Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Atomic Structure. Revise 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.

More resources for Atomic Structure

All Telangana Open School (TOSS) Class 12 Chemistry Syllabus

For serious students

Get the full Atomic Structure chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for Telangana Open School (TOSS) Class 12 Chemistry. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free