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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. How does an electron differ from a neutron ?

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  2. State the location of electrons, protons, protons and neutrons in an a...

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  3. Fill in the following blanks :

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  4. Fill in the following blanks in respect of an atom of an element :

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  5. (a) Describe Thomson's model of the atom. Which subatomic particle was...

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  6. (a) Describe the Rutherford's model of an atom. State one drawback of ...

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  7. (a) Describe Bohr's model of the atom. How did Neils Bohr explain the ...

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  8. (a) What is mean by (i) atomic number, and (ii) mass number, of an ele...

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  9. Rutherford's alpha particle scattering experiment led to the discovery...

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  10. Which one of the following is a correct electronic configuration of so...

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  11. Which subatomic particle is not present in an ordinary hydrogen atom ?

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  12. The subatomic particle called electron was discovered by :

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  13. Which of the following represents the correct electron distribution in...

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  14. The correct electronic configuration of a chloride ion is :

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  15. Goldstein's experiments which involved passing high voltage electricit...

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  16. The number of electrons in the atom of an element X is 15 and the numb...

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  17. The ion of an element has 3 positive charges. The mass number of atom ...

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  18. The first model of an atom was given by

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  19. Which of the following statement is always correct?

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  20. From the symbol .(15)^(31)P, state : (i) mass number of phosphorus,...

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