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Lesson Plan of ATOM of Class 09

Lesson Plan of ATOM of Class 09

Complete Integrated Lesson Plan of ATOM 

This article contains complete lesson plan of Colloidal Solution of Class IX NCERT following CBSE board.

Pdf of this article is also available in complete tabular form

General Aims

  1. To develop interest of students in physical science.
  2. To develop an inquiry spirit in the students.
  3. To help students to see the physical science in relation to the rest of the culture.
  4. To develop interest in questioning.
  5. To develop critical thinking and scientific attitude.
  6. To develop supervisory ability in students.
  7. To develop problem solving skills in students.
  8. To make the students aware about inventions in the field of physical science and acquaint them with the knowledge of different streams of physical science.

Specific Objectives

  • Students will be able to define atoms.
  • Students will be able to discuss the postulates of Dalton’s atomic theory.
  • Students will be able to use Dalton’s postulates.

Teaching Aids

Chart paper, Roller board, pointer and other useful classroom equipments.

Previous Knowledge

Students are already aware about matter and elements.

Introductory Questions

Pupil-Teacher Activity

Student’s Response

Q1. Which metal is used to make jewellery and ornaments?

Gold, silver

Q2. What kind of substance is gold?

It is a metallic element

Q3. What is the building block of an element?


Statement of Aim

So today we are going to study the topic ‘Atoms‘.


Teaching point 1: Definition of Atom

Atoms are the basic units of matter and the defining structure of elements.

It was assumed that atoms are the smallest particle and cannot be divided further.

Teaching point 2: Postulates of Dalton’s Atomic Theory

Dalton gave following postulates in his atomic theory:

  1. All matter is made of very tiny particles called atoms.
  2. Atoms are indivisible particles which cannot be created or destroyed in a chemical reaction.
  3. Atoms of a given element are identical in mass and chemical properties.
  4. Atoms of different elements have different masses and chemical properties.
  5. Atoms combine in the ratio of small whole numbers to form compounds.
  6. The relative number and kinds of atom are constant in a given compound.
Teaching point 3: Existence of Atoms

Atoms of most elements are not able to exist independently.

Atoms, molecules and ions. These molecules or ions aggregate in large numbers to form the matter that we can see, feel or touch.

For example: Oxygen atoms will either exist in the form of molecules (O2) or form ions (O2-)

Blackboard Summary

  • Atoms are the smallest particle of the element.
  • Dalton gave atomic theory which had six postulates.
  • Most atoms cannot exist independently.
  • Atoms exist either in molecular or ionic form.
  • Atoms are the atoms are the building block of any element.

Classroom Supervision

Pupil-teacher will supervise the problem of the students and solve it.

Evaluation Questions

Q1. Smallest particle of an element is called _______.

Q2. Dalton gave ________ theory.

Q3. Atoms can be destroyed very easily. (True/False)

Q4. Atoms can exist in molecular form. (True/False)

Q5. Dalton’s theory had how many postulates?


Q. Write down the postulate given by Dalton in his atomic theory.

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