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.
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.