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UPSC Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Elements Classification and Chemical Bonding

  • question_answer
          The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all -

    A) halogens           

    B)        noble gases

    C) noble metals       

    D)       light metals

    Correct Answer: B

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