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Revision Notes

Metals and Non-metals

Karnataka Board · Class 10 · Science

Quick revision notes for Metals and Non-metals — Karnataka Board Class 10 Science. Key concepts, formulas, and definitions for last-minute revision.

44 questions20 flashcards5 concepts

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Key Topics to Revise

1

Physical Properties of Metals and Non-metals

  • Metallic lustre: Metals have shiny surfaces when freshly cut or polished (e.g., gold, silver, copper)
  • Malleability: Metals can be beaten into thin sheets. Gold and silver are most malleable - gold leaf used in decorations
  • Ductility: Metals can be drawn into thin wires. Gold is most ductile - 2 km wire from 1g gold
2

Chemical Properties of Metals

  • Reaction with Oxygen: Almost all metals form metal oxides (basic in nature)
  • Reactivity with oxygen varies: K, Na catch fire; Mg burns with white flame; Cu forms black coating
  • Amphoteric oxides: Al₂O₃, ZnO react with both acids and bases
3

Reactivity Series and Applications

  • Activity Series: K > Na > Ca > Mg > Al > Zn > Fe > Pb > [H] > Cu > Hg > Ag > Au
  • Most reactive: Potassium (stored in kerosene oil to prevent reaction with air/water)
  • Moderately reactive: Iron, Zinc, Lead (found as oxides, sulfides, carbonates)
4

Ionic Compounds Formation and Properties

  • Formation: Transfer of electrons from metal atoms to non-metal atoms
  • Metal loses electrons → Cation (positive ion); Non-metal gains electrons → Anion (negative ion)
  • Electrostatic attraction holds oppositely charged ions together

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Full Notes

Key Concepts

Metals exhibit metallic lustre (shining surface)NonMetals react with oxygen to formA list of metals arrangedMetals lose electrons to form positive

Frequently Asked Questions

What are the important topics in Metals and Non-metals for Karnataka Board Class 10 Science?
Metals and Non-metals covers several key topics that are frequently asked in Karnataka Board Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Metals and Non-metals — Karnataka Board Class 10 Science?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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