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Atoms and Molecules

NIOS · Class 10 · Science & Tech

Step-by-step guide to study Atoms and Molecules in NIOS Class 10 Science & Tech. Topics to cover, practice strategy, and time allocation.

93 questions42 flashcards5 concepts

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An infographic comparing the ancient Indian (Maharishi Kanad, Pakudha Katyayan) and Greek (Democritus, Leucippus) philosophical ideas about the divisibility of matter and the concept of 'Parmanu' and
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 93 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Atoms and Molecules after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • Matter is made of very small particles.
  • Kanad named the smallest indivisible particles PARMANU.
  • Pakudha Katyayan said particles usually exist in combined form.

  • Mass is conserved in chemical reactions.
  • Lavoisier's mercury experiment led to the law of conservation of mass.
  • Proust demonstrated the law of definite proportions in 1808.

  • Dalton published his atomic theory in 1803.
  • Matter consists of indivisible atoms.
  • Atoms of one element are alike in mass and properties.

Common Mistakes to Avoid

Matter is truly indivisible, so atoms cannot be broken into anything smaller.

The law of conservation of mass means the mass of every single substance stays the same during a reaction.

The law of constant proportions means every sample of a compound has the same mass, whatever the amount taken.

Memory Tips

Maharishi Kanad and the idea of indivisible smallest particles

Democritus and Leucippus on atoms

Dalton's atomic theory key postulates

Law of conservation of mass

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Frequently Asked Questions

What are the important topics in Atoms and Molecules for NIOS Class 10 Science & Tech?
Key topics in Atoms and Molecules include Atoms and Molecules Concept Map, Atoms and Molecules - Chapter Overview, Atoms and Molecules - Complete Chapter Overview. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Atoms and Molecules — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 93 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.

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