CBSE Class 9 Science Atoms and Molecules Worksheet Set 03

Practice Worksheets for Class 9 Science: Chapter 03 Atoms and Molecules

Access printable practice worksheets for Chapter 03 Atoms and Molecules designed to align with the 2026-27 academic syllabus for Class 9 Science. These structured exercises help students evaluate their conceptual understanding and improve exam readiness.

Practice Chapter 03 Atoms and Molecules Worksheets for Class 9 Science

Access the complete worksheet PDF for Chapter 03 Atoms and Molecules below. Regular practice with these targeted questions builds familiarity with standard exam patterns and helps secure higher marks in final Science evaluations.

Practice Worksheet
CBSE Class 9 Science
Topic: Atoms and Molecules

Very Short Answer
 
Q1) What is the significance of valency? 
Ans: Valency is used to find out how atom of an element will combine with the atom of another element to form a chemical compound.
 
Q2) Define Avogadro’s constant. 
Ans: Avogadro’s Constant (6.022 x 1023) is the number of atoms of an element present in one mole of that element.
 
Q3) What is the
a. the mass of a mole of oxygen gas
b. the mass of an oxygen ion
Ans:  a. Mass of a mole of oxygen gas
1 mole of oxygen = O2 = 2 x 16 =32u
b. Mass of an oxygen ion = mass of an oxygen atom (since electrons have negligible mass)
= =6.022 x 1023 atoms
 
Q4) What is the atomicity of oxygen and phosphorous? 
Ans: Atomicity of oxygen, O2= 2 and atomicity of phosphorous, P4= 4.

Q5) Write the symbols of tungsten and iron.
Ans: Tungsten is W
Iron is Fe
 
 

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Download CBSE Practice Material: Class 9 Science Chapter 03 Atoms and Molecules

Download Practice Sheet: Chapter 03 Atoms and Molecules (Class 9 Science)

Review targeted practice exercises for Class 9 Science Chapter 03 Atoms and Molecules. Curated to match official CBSE guidelines, these downloadable PDF sheets support daily revision and core concept reinforcement.

Concept Clarification for Chapter 03 Atoms and Molecules

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FAQs

Where can I download the latest PDF for CBSE Class 9 Science Atoms and Molecules Worksheet Set 03?

You can download the teacher-verified PDF for CBSE Class 9 Science Atoms and Molecules Worksheet Set 03 from StudiesToday.com. These practice sheets for Class 9 Science are designed as per the latest CBSE academic session.

Are these Science Class 9 worksheets based on the 2026-27 competency-based pattern?

Yes, our CBSE Class 9 Science Atoms and Molecules Worksheet Set 03 includes a variety of questions like Case-based studies, Assertion-Reasoning, and MCQs as per the 50% competency-based weightage in the latest curriculum for Class 9.

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Yes, we have provided detailed solutions for CBSE Class 9 Science Atoms and Molecules Worksheet Set 03 to help Class 9 and follow the official CBSE marking scheme.

How does solving CBSE Class 9 Science Atoms and Molecules Worksheet Set 03 help in exam preparation?

Daily practice with these Science worksheets helps in identifying understanding gaps. It also improves question solving speed and ensures that Class 9 students get more marks in CBSE exams.

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