TEACHGYAN • CLASS 10 SCIENCE • NCERT 2026–27
Chapter 3: Metals and Non-metals
Detailed Notes • Diagrams • Experiments • Competency • Board Practice
📖 Chapter Explanation
Metals and non-metals differ in physical and chemical properties, but their behaviour can be understood through electron transfer, reactivity and compound formation. The chapter connects the reactivity series with extraction, corrosion and ionic compounds.
🧭 Concept Map
🔬 Core Science Concepts
Metals generally form positive ions by losing electrons, while many non-metals form negative ions by gaining electrons. Ionic compounds are formed through electrostatic attraction between oppositely charged ions.
💡 Worked Example / Observation
Sodium forms Na⁺ by losing one electron, while chlorine forms Cl⁻ by gaining one. Their electrostatic attraction gives NaCl an ionic structure.
🖼️ Diagram & Visual Study
Draw and label: a key diagram/process from this chapter. Add arrows showing the sequence or relationships, then write one function/observation beside each labelled part. This page is designed to be paired with textbook figures for visual revision.
⚠️ Common Errors
The reactivity series helps predict displacement reactions. A more reactive metal can displace a less reactive metal from its salt solution.
🧠 Concept-Based MCQs
- A zinc strip is placed in copper sulphate solution. Predict the observation, write the reaction and explain it using the reactivity series.
Answer Key: 1-C, 2-B, 3-B, 4-A.
📊 Case-Based / Competency
Do not assume every metal reacts equally with water or acids. Reactivity varies considerably, and extraction methods depend on the metal’s position in the reactivity series.
- Identify the scientific concept.
- Use the relevant equation, process or diagram.
- Explain the observation using scientific reasoning.
- State and justify the conclusion.
🔎 Extension Case
Which metal can displace copper from CuSO₄? A) silver B) gold C) zinc D) platinum|Ionic compounds generally have: A) low melting points only B) high melting points C) no ions D) no electrostatic attraction|Metals tend to form: A) anions B) cations C) neutral atoms only D) molecules only|Rusting is a form of: A) corrosion B) distillation C) sublimation D) neutralisation
🔥 HOTS & Board Challenge
- Predict what would happen if one condition changed.
- Explain the observation at the particle/cellular/system level where appropriate.
- Correct a plausible misconception and justify your correction.
- Design a simple investigation to test a related idea.
✍️ Exam Practice
- Define the central scientific terms.
- Explain one process using a labelled diagram.
- Write and balance/interpret an equation where applicable.
- Solve a competency-based situation.
- Answer a 5-mark board-style question with reasoning.
🧪 Activity / Experiment Corner
- State the aim.
- List the key materials/conditions.
- Predict the observation.
- Record the result.
- Explain the scientific principle.
📄 Practice Worksheet
- 5 concept checks
- 5 application questions
- 3 diagram/process questions
- 2 case-based questions
- 2 HOTS questions
- 1 board-style challenge
🎯 One-Minute Revision
properties → reactions with oxygen/water/acids → reactivity series → ionic compounds → extraction → corrosion
🏆 Mastery Checklist
- ☐ I can explain the concept in my own words.
- ☐ I can draw/interpret the key diagram.
- ☐ I can explain observations scientifically.
- ☐ I can answer competency and case-based questions.
- ☐ I can apply the concept to a new situation.
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Original explanatory study material aligned to NCERT/CBSE topics; textbook passages are not reproduced verbatim.