NCERT Solutions for Class 8 Science Chapter 4: Materials - Metals and Non-Metals

In this chapter, we will discuss the chemical and physical properties. The chapter tells us about the different properties of metals and how they are distinguishable from non-metals. We also learn about how metals and non-metals react with different substances. The chapter concludes by listing the different uses of metals and their importance in our lives.

• The chapter begins by listing the physical properties of metals and non-metals.
• Physical properties of metals include malleability, ductility, and sonority.
• Metals are also good conductors of heat and electricity.
• Examples of metals are aluminium, iron, copper, etc.
• Non-metals, on the other hand, are not malleable, ductile or sonorous.
• They are also not usually good conductors of heat and electricity.
• Examples of non-metals are sulphur, carbon, oxygen, etc.
• The chapter further tells us about the chemical reaction of metals and non-metals with different substances.
• We study their reactions with water, reactions with oxygen, reaction with acids, and bases.
• We also learn about displacement reactions in metals and non-metals.
• The chapter also entails chemical formulas of different metals and non-metals and also formulas of their chemical reactions.
• The chapter ends by listing the various uses of metals and non-metals.
• Metals are used in automobiles, trains, industrial gadgets, aeroplanes, cooking utensils, water boilers, etc.
• Non-metals are used in fertilisers, water purification, antiseptics, and crackers, and they are also essential for our breathing.