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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
      The atomic number of calcium and argon are 20 and 18 respectively but the mass number of both these elements is 40. What is the name given to such a pair of elements?

    Answer:

      Since, the given elements have same mass number but different atomic numbers, they are called isobars.


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