Skip to main content
Super TutorResources
Chapter 4 of 9
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Atomic Structure and Chemical Bonding

ICSE · Class 9 · Chemistry

Quick revision notes for Atomic Structure and Chemical Bonding — ICSE Class 9 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

42 questions44 flashcards5 concepts

Interactive on Super Tutor

Studying Atomic Structure and Chemical Bonding? Get the full interactive chapter.

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

Try Super Tutor — Free

1,000+ Class 9 students started this chapter today

A labeled diagram illustrating J.J. Thomson's cathode ray tube experiment, showing the generation of cathode rays, their deflection by electric and magnetic fields, and how this led to the discovery o
Super Tutor

Learn better with visuals Super Tutor has hundreds of illustrations like this across every chapter — all free to try.

Get started

Key Topics to Revise

1

1. Early ideas and discovery of subatomic particles

  • Maharshi Kanada first proposed that matter consists of indestructible minute particles called paramanus.
  • Democritus called the paramanu an atom, meaning indivisible.
  • John Dalton gave the first scientific theory about matter in 1808.
2

2. Structure of the atom

  • An atom has two main parts: nucleus and extra-nuclear space.
  • The nucleus is the central part and contains protons and neutrons.
  • Electrons revolve around the nucleus in orbits or shells.
3

3. Fundamental particles of the atom

  • Electron is a negatively charged fundamental particle found outside the nucleus.
  • Proton is a positively charged fundamental particle found in the nucleus.
  • Neutron is a neutral fundamental particle found in the nucleus.
4

4. Atomic models and discovery of nucleus

  • Thomson's plum pudding model described the atom as a sphere of uniform positive charge with electrons embedded in it.
  • Rutherford conducted the alpha-particle scattering experiment using gold foil.
  • Most alpha particles passed straight through, showing that an atom has a lot of empty space.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

An element is made upAtoms contain electronsAtomic number equals the numberElectrons are arranged in shellsValence electrons are the electrons

Frequently Asked Questions

What are the important topics in Atomic Structure and Chemical Bonding for ICSE Class 9 Chemistry?
Key topics in Atomic Structure and Chemical Bonding include Atomic Structure and Chemical Bonding — Complete Concept Map, Atomic Structure — Complete Overview, Complete Chapter Concept Map: Atomic Structure and Chemical Bonding. These are the concepts ICSE Class 9 examiners draw on most — study them first, then practise related questions.
How to score full marks in Atomic Structure and Chemical Bonding — ICSE Class 9 Chemistry?
Understand the core concepts first, then work through the 42 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.

More resources for Atomic Structure and Chemical Bonding

All 9 chapters — ICSE Class 9 Chemistry Revision Notes

For serious students

Get the full Atomic Structure and Chemical Bonding chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 9 Chemistry.

Try Super Tutor Free
Try the full chapter — Free