Question

a piece of chalk can be broken dawn in to small piece when hammered but it is not posdibel to do so in case of an iron bar?explain

Answer 1

the particles of matter have force acting between them. this force keeps the particles together. the magnitude of this force is lesser in chalk, hence it could be easily broken down into pieces on hammering. whearas, the magnitude of this intermolecular force is more in iron, hence it cannot be broken into small pieces on hammering 

Answer 2

Answer:the particles of matter attract one another (some attract less as in the case of chalk but some attract much more as in the case pf iron)

Explanation: