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Chapter 2ChemistryCBSE Class 11

Structure of Atom

Structure of Atom is Chapter 2 of NCERT Class 11 Chemistry. The chapter covers Discovery of Sub-atomic Particles, Atomic Models, Developments Leading to the Bohr's Model of Atom, Bohr's Model for Hydrogen Atom, and more. Use this public guide to revise the official topic structure before asking Lerno for step-by-step help.

6 topicsChapter 2 of 9
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Topics covered

6 sections
01

Discovery of Sub-atomic Particles

IntroductionDiscovery of ElectronCharge to Mass Ratio of ElectronCharge on the ElectronDiscovery of Protons and Neutrons
02

Atomic Models

IntroductionThomson Model of AtomRutherford's Nuclear Model of AtomAtomic Number and Mass NumberIsobars and IsotopesDrawbacks of Rutherford Model
03

Developments Leading to the Bohr's Model of Atom

IntroductionWave Nature of Electromagnetic RadiationParticle Nature of Electromagnetic RadiationEvidence for the Quantized Electronic Energy Levels: Atomic Spectra
04

Bohr's Model for Hydrogen Atom

IntroductionExplanation of Line Spectrum of HydrogenLimitations of Bohr's Model
05

Towards Quantum Mechanical Model of the Atom

IntroductionDual Behaviour of Electromagnetic RadiationParticle Nature of Matter: de Broglie's Relationship
06

Quantum Mechanical Model of Atom

IntroductionHeisenberg Uncertainty PrincipleShapes of Atomic OrbitalsEnergies of OrbitalsFilling of Orbitals in AtomElectronic Configuration of AtomsStability of Completely Filled and Half-Filled Subshells

Key concepts

Discovery of Sub-atomic ParticlesAtomic ModelsDevelopments Leading to the Bohr's Model of AtomBohr's Model for Hydrogen AtomTowards Quantum Mechanical Model of the AtomQuantum Mechanical Model of AtomIntroductionDiscovery of ElectronCharge to Mass Ratio of ElectronCharge on the Electron

Practice questions

Frequently asked

What is covered in Structure of Atom?

Structure of Atom is Chapter 2 in NCERT Class 11 Chemistry. The verified chapter structure includes Discovery of Sub-atomic Particles, Atomic Models, Developments Leading to the Bohr's Model of Atom, Bohr's Model for Hydrogen Atom, Towards Quantum Mechanical Model of the Atom.

How should I revise Structure of Atom?

Revise the chapter topic by topic: start with Discovery of Sub-atomic Particles, Atomic Models, Developments Leading to the Bohr's Model of Atom, then practice questions that mix definitions, examples, and application steps.

Can I use Lerno for Class 11 Chemistry questions?

Yes. Lerno is built for CBSE students and uses NCERT-grounded context so students can ask for explanations, practice prompts, and step-by-step guidance for this chapter.

Study prompts

1

Explain Discovery of Sub-atomic Particles from Structure of Atom and give one NCERT-style example or practice step.

2

Explain Atomic Models from Structure of Atom and give one NCERT-style example or practice step.

3

Explain Developments Leading to the Bohr's Model of Atom from Structure of Atom and give one NCERT-style example or practice step.

4

Explain Bohr's Model for Hydrogen Atom from Structure of Atom and give one NCERT-style example or practice step.

5

Explain Towards Quantum Mechanical Model of the Atom from Structure of Atom and give one NCERT-style example or practice step.

6

Explain Quantum Mechanical Model of Atom from Structure of Atom and give one NCERT-style example or practice step.

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Practice QuestionsChapter-wise NCERT-aligned questionsSolutions GuideStep-by-step approach per topicChapter ExplanationTopic map for structured revision

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