CBSE Class 9 Science Chapter 3 Atoms And Molecules Notes

The smallest particle of an element that can possibly exist is known as an atom while molecules are a cluster of atoms bonded together representing the tiniest basic unit of a chemical compound which can take part in a chemical reaction. Get access to class 9 chapter 3 atoms and molecules notes right here.

CBSE Class 9 Science Chapter 3 Atoms And Molecules

Topics Covered in Chapter 9 Atoms And Molecules:

  • Laws of Chemical Combination
  • What is an Atom?
  • What is a Molecule?
  • Writing Chemical Formulae
  • Molecular Mass and Mole Concept

Explore more on chapter 3 atoms and molecules notes at BYJU’S.

Frequently asked Questions on CBSE Class 9 Science Notes Chapter 3: Atoms and Molecules


What are atoms made up of?

An atom is composed of protons, which have a positive charge, and neutrons, which have no charge.


What is ‘Molecular mass’?

Molecular mass of a substance is defined as the sum o the atomic masses of all the atoms present in a molecule of a substance.


What is a ‘Mole’?

A mole is a unit of measurement used to measure the amount of any fundamental entity (atoms, molecules, ions) present in the substance.


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