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

  • question_answer
      The atom of an element has 9 protons, 9 electrons and 10 neutrons. (a) What is the atomic number of the element? (b) Predict the valency of the element.

    Answer:

          (a) The atomic number of element = Number of proton = 9 The element is fluorine (F).         (b) Electronic distribution In order to complete its octet it requires one electron so, valency =8?7=1 The valency of the element is 1.  


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