SUB-ATOMIC PARTICLES OF ATOM

Structure of atom of Class 9

SUB-ATOMIC PARTICLES OF ATOM

For understanding the nature of charged particles in atoms, let us carry out the following activities: 

Activity

  • Comb dry hair. Does the comb then attract small pieces of paper? 
  • Rub the glass rod with a silk cloth and bring the rod near an inflated balloon. Observe what happens? 

Discussion 

  • When we comb our dry hair, and put the comb near the small pieces of paper, we observe that the small pieces of paper got attracted towards the comb. 
  • When the glass rod rubbed by a silk cloth was brought near the inflated balloon, the inflated balloon got attracted towards the rod. 

Conclusion

From the above observation, we conclude that on rubbing two objects together, they become electrically charged. The charge produced show that atom consists of charged particles also known as sub-atomic particles.

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