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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
    An element has electronic configuration \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{4}}\]. Predict their period, group and block [CPMT 2000]

    A) Period = 3rd, block = p, group = 16

    B) Period = 5th, block = s, group = 1

    C) Period = 3rd, block = p, group = 10

    D) Period = 4th, block = d, group = 12

    Correct Answer: A

    Solution :

      By obserbing principal quantum number (n), Orbital \[(s,p,d,f)\] and equating no. of \[{{e}^{-}}\]?s we are able to find the period, block and group of element in periodic table.


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