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Metals and Non Metals — Revision Notes

ICSE · Class 7 · Chemistry

Metals and Non Metals revision notes for ICSE Class 7 Chemistry: 4 topics in quick points. Part of the ICSE Class 7 Chemistry syllabus.

54 questions35 flashcards5 concepts

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Key Topics to Revise

1

1. Classification of Elements

  • Elements are divided into metals, non-metals, metalloids, and noble gases.
  • Metals and non-metals are classified on the basis of their physical properties.
  • Metalloids show some properties of metals and some properties of non-metals.
2

2. General Properties of Metals and Non-Metals

  • Metals are generally lustrous, hard, sonorous, malleable, ductile, and strong.
  • Non-metals are generally dull, soft or brittle, non-sonorous, and poor conductors.
  • Metals usually have high density and high melting and boiling points.
3

3. Important Uses of Metals

  • Gold is shiny yellow, highly malleable, and found in free state because it is not reactive.
  • Pure gold is 24 carat, and 22 carat gold is 22 parts pure gold mixed with 2 parts copper or silver.
  • Silver is greyish white, highly malleable and ductile, and the best conductor of heat and electricity.
4

4. Important Uses of Non-Metals and Metalloids

  • Oxygen is needed for breathing, respiration, and combustion.
  • Nitrogen forms 78% of air in free state and is used in food canning and fertilizers.
  • Carbon occurs as coal, graphite, and diamond.

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Full Notes

Key Concepts

Metals are generally lustrousNonMetalloids show some properties of metalsInert gases are colourlessRust is hydrated ferric oxide

Frequently Asked Questions

What are the important topics in Metals and Non Metals for ICSE Class 7 Chemistry?
Key topics in Metals and Non Metals include Classification of Elements, General Properties of Metals and Non-Metals, Important Uses of Metals, Important Uses of Non-Metals and Metalloids. Study these first, then practise questions on each for Class 7 exams.
How should I revise Metals and Non Metals for Class 7 exams?
Learn the core ideas first, then work through the 54 practice questions on Metals and Non Metals. Revise 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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