Question

Collect the information about physical properties of metals and uses metals in every day life for project work

Answer 1

Answer:-

Physical Properties of Metals:

Metals are electro - positive elements.

• They are hard, lustrous (shine) & sonorous (make sound).

• They are malleable & ductile . (can be made into thin sheets & wires.)

• They are good conductors of Heat & Electricity.

• They are generally in solid state (exceptional case - Mercury (Hg) is a liquid metal ).

• They have high melting and boiling points.

Uses of Metals:-

• They are used to make vehicles like buses , cars & bikes.

• They are used to make utensils , household items.

• Metals like gold , silver are used to make ornaments.

• Mercury is used in thermometers.

• Metals like iron is used for construction of buildings.

Answer 2

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⇝ Physical properties of metals :-

※ Metals are malleable :-

⟹ All the metals can be beaten into thin sheets with a hammer e.g. gold, silver aluminium etc.

※ Metals are ductile :-

⟹ Metals can be stretched into thin wires.

★ But all metals are not equally ductile. Some metals are more ductile than others e.g. gold, silver and copper etc

※ Metals are good conductor of heat and electricity :-

⟹ All the metals are good conductors of heat.

★ Silver metal is best conductor of heat and lead is the poorest conductor of heat.

★ Silver is also good conductor of electricity and next to it comes copper whereas iron and mercury are poor conductors of electricity.

※ Metals are lustrous :-

⟹ Metals are Lustrous and can be polished.

※ Metals are solid at room temperature :-

⟹ The melting and boiling points of metals are generally high.

※ Rigidity :-

⟹ Generally, metals are hard.

★ But sodium and potassium are soft metals and can be cut with a knife.

※ Metals are sonorous :-

⟹ Metals produce sound when hit with an object.

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⇝ Uses of metals :-

↪ Gold, Platinum and silver are used as jewelleries and ornaments.

↪ Iron and steel are used for construction purpose.

↪ Aluminium, steel are used as utensils.

↪ Mercury is used in thermometer and helps to check the temperature.

↪ Aluminium are used as insulation wires.