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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Extended or long form of periodic table

  • question_answer
    The elements with atomic numbers 9, 17, 35, 53, 85 are all [KCET 2004]

    A) Noble gases

    B) Halogens

    C) Heavy metals

    D) Light metals

    Correct Answer: B

    Solution :

    These atomic no. gives the configuration \[n{{s}^{2}}n{{p}^{5}}\] which are of halogen group or VIIth group.


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