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

  • question_answer
      In the following table the mass numbers and 'the atomic numbers of certain elements are  given.
    Element A B C D E
    Mass No. 1 7 14 40 40
    At. No. 1 3 7 18 20
    (i)Select a pair of isobars from the above table. (ii) What would be the valency of element C listed in the above table? (iii) Which two subatomic particles are equal in number in a neutral atom?

    Answer:



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