Question

As u know friends i am not a very easy questioner so let start some hards.


1) Without any google, give me 10 properties of metals. (Think and write)

2) Write four uses of metals.

[10+4=14marks]


Again, Describe the term elements in such a way that it is applicable for 3-4 marks.



All the best

Answer 1

⭐⭐⭐⭐⭐ ANSWER ⭐⭐⭐⭐⭐


⚡ TEN PROPERTIES OF METALS ⚡

➡ Metals are malleable.

➡ Metals are ductile.

➡ Metals are good conductors of heat and electricity.

➡ Metals are lustrous, i.e., they have a shining surface.

➡ Metals are generally hard and this hardness varies from metals to metals.

➡ Metals have high melting and boiling points.

➡ Metals have high tensile strength.

➡ Metals are mostly at solid state in room temperatures (EXCEPT - MERCURY).

➡ Metals usually have silver or grey colour.

➡ Metals are sonorous, i.e., they make a ringing sound when hit.

⚡ FOUR USES OF METALS ⚡

➡ Copper and aluminium are used for making electric wires.

➡ Sodium is used in nuclear reactors.

➡ Mercury is used in thermometers.

➡ Gold, silver, platinum are used for making ornaments.

⚡ ELEMENTS - A DETAILED INFO ⚡

➡ An element is defined as a pure and the simplest form of matter which can neither be broken into nor built up from simpler substances, by any physical or chemical methods.

➡ Examples :- Iron, Oxygen, Hydrogen, Carbon, Tin, Gold, Platinum, Copper, Mercury, Aluminium, etc.

➡ An element contains only one kind of atoms. For example, iron is made up of only one kind of atoms called iron atoms. Therefore, we can say that iron is an element.

➡ There are 118 known elements on the Earth. Of these, 92 elements are found naturally occurring and the remaining 26 are man-made.

➡ Elements can be classified into four types on the basis of physical properties.

➡ The classifications are - Metals, Non-metals, Metalloids and Noble or inert gases.





⭐⭐⭐ ALWAYS BE BRAINLY ⭐⭐⭐

Answer 2

HEY

HERE IS YOUR ANSWER

1.The following are the physical properties of metal :

1.The physical properties make them useful for many purposes. For e.g. Copper is used in making electric wires, gold is used to make jewellery, stainless steel is used to make pots, pans, etc

2.Metals react with nonmetals to form ionic bonds. For e.g. Sodium Chloride (NaCl)

3.Metals are a good conductor of electricity which means that they can conduct electricity due to the free moving electrons present in them. Copper is used as wiring as it is a good conductor of electricity.

4.Metals have high melting points and high boiling points as they have strong metallic bonds.

5.All metals are physically lustrous. They have a lustre that makes them shine. Gold is used for making jewellery.

6.Metals are hard, they can’t be broken easily and require a lot of energy and strength to break.  Iron is used to make cars, buildings, ships, etc.

7.Metals weigh a lot as they have a high density. Metals are heavy for their size.

8.They don’t have flexibility and have tensile strength. Metals can’t be stretched.

9.Metals are great conductors of heat. That’s why pots, pans, vessels are made of metals.

10.They are good conductors of sound. They are sonorous.

2.USES OF METALS:-

1.Iron or steel is used for the construction of bridges, houses, automobile parts, etc. ...

2.Aluminium is a light metal and a good conductor of electricity. ...

3.The liquid metal mercury is used in making thermometers.

4.Copper and aluminium metals are used to make wires to carry electric current.

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