class 9 chemestry chapter 4 the structure of atom practice sheet

 

CLASS: IX; CHEMISTRY

CHAPTER-4

THE STRUCTURE OF ATOM (MLP)

 

 

1.   What are nucleons?

2.   Give the electronic configuration of Cl^– ion.

3.   Draw the atomic structure of Helium atom.

4.   What are isobars?

5.   Define mass number of an atom?

6.   What are isotopes? Give its two applications.

7.   An atom is electrically neutral. How can it become charged?

8.   Explain Rutherford’s α-particle scattering experiment and give its    

       observation and conclusion drawn.

9.  Give the difference between three sub-atomic particles.

10.  Give the names of three atomic species of hydrogen.

11.   An atom has atomic number 12, what is its valency and name the  

        element?

12.   Name two elements with same number of protons and neutrons?

13.   Name the isotope used for treatment of cancer.

14.   Draw the atomic structure of (i) an atom with same number of sub-

        atomic particles, (ii) an atom with same number of electrons in L and M     

        shell.

15.   What is an octet? Why would atoms want to complete their octet?

16.   Find the valency of 

17.   Give the difference between three sub-atomic particles.

18.   Draw the Bohr's model to represent Calcium atom..

 

 

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