Tamil Nadu Matriculation Board
Class IX : Chemistry

Chapter 1: Atomic Structure

   
Essay Answer Questions: 

Q1. What is an atom? Describe mass number and atomic number
   . 

Q2. Discuss the energy levels of an atom. How are they calculated and arranged? 
   

Q3. Draw the atomic structure of a. argon b. sodium c. helium. Write down the number of protons neutrons and electrons. 
    

Q4. Explain Gold leaf electroscope. 
   

Q5. What is classical physics? What are the drawbacks of Rutherford's model?  
      

Q6. Discuss about neutrons. 
     

Q7. What are sub atomic particles. Give a brief account of it. 
     

Q8. Write a brief account of charge and mass of electrons. 
    

Q9.  Explain the characters of cathode rays. 
   

Q10.  How are cathode rays produced? 
    

Solution