Learn Class 8 Science - Metals and Non-metals

Our environment has various materials with different impressions, textures, sizes, and shapes.

This material is divided into two categories

1. Metals
2. Non-metals

Metals - Metals is a material that's opaque, hard, shiny with marvellous electrical and thermal conductivity. Ex:- Copper, Aluminium, Iron, etc.

Non - Metals - Material with a lousy conductivity of heat and electricity, non-lustrous with low density and strength are known as non-metals. Non-metals lack the properties of metal. Ex:- Carbon, phosphorus, etc.

Physical Properties

• Metals in their pristine form show shine.
• Metals are malleable.
• Metal shows flexibility, which means it can be drawn into wires.
• Metals are good conductors of heat and electricity, which means heat and electricity can pass through them.
• Non-metals do not have a metallic lustre.
• Non-metals don't show malleability and ductility.
• Non-metals show low conductivity or, say, bad conductivity.

Chemical Properties

• Most metals react with O2 and form metal oxide.
• Metals react with water and form metal hydroxides or metal oxides and hydrogen.
• Non-metals react with O2 to create neutral or acidic oxides.
• Non-metals do not show any reaction with water.
• Some non-metals are highly reactive in the air, so they are stored in water.
• Non-metals do not show reaction with dilute acid.