Question

explain by giving some example that particle of matter are attract each other

Answer 1

In solids the intermolecular distance is very less, therefore force of attraction between particles is maximum. In liquids the intermolecular distance and force of attraction  between the particles is intermediate between solids and gases.

There exist least forces of attraction between particles of gases as the particles present far from each other.
If we take a piece of chalk, a cube of ice and an iron nail, and beat them with a hammer, we will find that it is very easy to break the piece of chalk into smaller pieces, it requires more force to break a cube of ice, whereas the iron nail does not break at all even with a large force. This shows that the force of attraction between them particles of chalk is quite weak, the force of attraction between the particles of ice is a bit stronger whereas the force of attraction between the particles of iron nail is very, very strong. 

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Answer 2

Ans.1- Particles of matter attract each other because of force of attraction. Force of attraction between particles of matter keeps the particles bonded together. The force of attraction between particles of solid is greatest, between particles of liquid is moderate and between particles of gas is lowest.
Ans.2- This means that some of the water molecules are able to overcome the intermolecular forces that are holding them close together, and the molecules move further apart, forming liquid water. This is why liquid water is able to flow: the molecules have greater freedom to move than they had in the solid lattice.

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