The Characteristics of Particles of Matter are

  • Particles are very, very small
  • These particles have spaces between them
  • These particles are constantly moving
  • Particles attract each other

 

Let's discuss these properties one by one

Particles of Matter are very small

Every matter is made up of very small minute particles like atoms

 

One gram of matter has billions of small particles called atoms

Example

One grain of salt has 1.2 × 10 18 atoms = 1000000000000000000 atoms

 

Activity to show particles of matter are very small

 

  • Take 2-3 Crystals of Potassium Permanganate solution
  • Mix it in 100 ml of water.
  • We notice water turns purple in color
  • Now, we take out 10 ml of this 100 ml and we put into 90 ml of clear water in new beaker
  • We notice water turns purple in color
  • We again repeat this process and take out of 10 ml from this new solution and put it in another 90 ml of clear water
  • We notice that water again turns purple

 

We keep on repeating the process and water continues to turn purple

This shows that particles of matter are very small

 

Particles of matter Are constantly Moving

Particles of Matter are not stationary

They move from one place to another

This movement is fast in gases, slower in liquids and slowest in solids

 

Example 1

When we light an incense stick (agarbatti)

We are able to smell it from another corner of the room

This is because gas particles from incense stick have reached our nose

Example 2

If we drop some ink in a beaker of water

The whole beaker turns blue

This is because ink particles have managed to reach different parts of the beaker

 

Example 3

If we drop a crystal of potassium permanganate in water

Whole water turns purple

This is because particles of potassium permanganate are able to move in a beaker of water

 

Particles of Matter Have Spaces between Them

Different particles of matter have spaces between them

This is the reason that we can dissolve one form of matter over other forms of matter

 

Example 1

When we dissolve salt in water

Salt particles get into spaces between water particles and we are not able to see them after they dissolve


Example 2

When we make tea

Different particles like Tea, Sugar, Milk fit into spaces between each other

 


Particles of Matter Attract Each Other


There is some force of attraction between different particles which bind them together

This force of attraction is different for different particles


Example 1

We take a piece of chalk and iron nail

We strike both of them with a hammer

It is easier to break chalk but not iron nail

This is because the force of attraction is higher in particles of iron nail compared to chalk

 


Example 2

We are able to move our hand through the air very easily

but it is a little difficult in water

But is impossible to do so over solid substance like wood

This is because force of attraction of particles is highest in solids, less in liquids and even lesser in gases

Particles of matter are very small - Teachoo.png

Particles of Potassium Permanganate are able to move in a a beaker of water - Teachoo.png

 

Activity to show particles of matter are very small Teachoo.png

Particles of matter have spaces between them and so we can dissolve one form of matter over another - Teachoo.png

Moving hand through water Teachoo.png

Gas particles move enabling us to smell the incense stick from a distance - Teachoo.png

Particles of Potassium Permanganate are able to move in a a beaker of water - Teachoo.png

  1. Class 9
  2. Chapter 1 Class 9 - Matter In Our Surroundings

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.