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

  • question_answer
      Which of the two would be chemically more reactive: element 'A' with atomic number 18 or element 'D' with atomic number 16 and why?       

    Answer:

                  Electronic configuration of It would be chemically inert due to its complete octet. Electronic configuration of To complete its octet, it will gain 2 electrons, therefore it will be more reactive.   


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