2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  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 Self Evaluation Test - Classification of Elements and Periodicity in Properties

  • question_answer
    The electronic configuration of an element is. The atomic number and the group number of the element 'X' which is just below the above element in the periodic table are respectively         

    A) 23 and 5           

    B) 23 and 15

    C) 33 and 15   

    D) 33 and 5

    Correct Answer: C

    Solution :

        [c] Atomic number of the given element =15; atomic number of element 'X' will be \[18+15=33;\] group no. of \['X'=10+5\] (valence electrons) = 15, period = 4th


You need to login to perform this action.
You will be redirected in 3 sec spinner