Materials: Metals and Non-Metals class 8 Notes Science

Materials: Metals and Non-Metals class 8 Notes Science in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Materials: Metals and Non-Metals class 8 Notes Science latest chapter wise notes for quick preparation of CBSE exams and school-based annual examinations. Class 8 Science notes on chapter 4 Materials: Metals and Non-Metals Science are also available for download in CBSE Guide website.

Class 8 Science notes Chapter 4 Materials: Metals and Non-Metals

Download CBSE class 8th revision notes for chapter 4 Materials: Metals and Non-Metals in PDF format for free. Download revision notes for Materials: Metals and Non-Metals class 8 Notes and score high in exams. These are the Materials: Metals and Non-Metals class 8 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter 4 in minutes. Revision notes in exam days is one of the best tips recommended by teachers during exam days.

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CBSE Class 8 Revision Notes Science Materials: Metals and Non-Metals

• Metals are strong and durable. Thus metals are used so widely for making almost everything
  Example: Metals are used in making machinery, automobiles, aeroplanes, buildings, trains, satellites, gadgets, cooking utensils, water boilers…etc.

Physical Properties of Metals

• The metal base in an electric iron is for conducting heat, not electricity.
• Metals are very good conductors of heat. Cooking utensils, irons, heaters, etc. are all made of metals which are good conductors of heat.
• Metals can be easily shaped into wires. This property of metals is called ductility.
• Metals can be easily shaped into thin flat sheets. This characteristic of metals is called malleability.
• Metals make a sound when struck with hard objects. Metals can be polished to a shiny appearance.

Chemical Properties of Metals

• metals react with oxygen to produce metal oxides which are basic in nature. Non-metals react with oxygen to produce non- metallic oxides which are acidic in nature.
• Some metals react with water to produce metal hydroxides and hydrogen gas. Generally, non- metals do not react with water.
• Metals react with acids and produce metal salts and hydrogen gas. Generally, non-metals do not react with acids.
• Some metals react with bases to produce hydrogen gas.
• More reactive metals displace less reactive metals from their compounds in aqueous solutions

Physical Properties of Non-metals

• Non-metals are non-lustrous, non-malleable and not ductile, except for carbon fibres, which are ductile.
• Non-metals are not sonorous. They do not produce any sound when hit..
• Non-metals do not conduct heat and electricity except for graphite

Chemical Properties of Non-metals·

• Non-metals react with oxygen to form their oxides. Non-metal oxides are acidic or neutral in nature.
• In general non-metals do not react with water though they may be very reactive in air.
• Non-metals do not react with acids

 Metals and non-metals are used widely in everyday life.

Materials: Metals and Non-Metals class 8 Notes Science

Materials: Metals and Non-Metals class 8 Notes Science. CBSE quick revision note for class-8 Science, Chemistry, Math’s, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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