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  5. Structure of the Atom

9th Class Science Structure of the Atom Question Bank 9th CBSE Science Structure of the Atom

  • question_answer
      Fill in the blanks.      
    Mass No. Atomic No. No. of protons No. of electrons No. of neutron Electronic configuration No. of valence electrons
    K L M N  
    12 6 - - - - - - - -
    40 20 - - - - - - - -

    Answer:

                                                                                           
    Mass No. Atomic No. No. of protons No. of electrons No. of neutron Electronic configuration No. of valence elctrons
    K L M N  
    12 6 6 6 6 2 4 - - 4
    40 20 20 20 20 2 8 8 2 2


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