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10th Class Science Periodic Classification of Elements Question Bank Periodic Classification of Elements

  • question_answer
    Which of the elements having following positions, have same number of valence electrons as that of element with atomic number 6?
    (i) Group 14 and period 5
    (ii) Group 14 and period 4
    (iii) Group 6 and period 4
    (iv) Group 14 and period 3
     

    A) (i) and (ii) only

    B) (i), (ii) and (iii) only

    C) (i), (ii) and (iv) only

    D) All of these

    Correct Answer: C

    Solution :

    For atomic number 6, the electronic configuration is 2, 4 and it is carbon atom. Carbon has 4 valence electrons and, it is a member of group 14 in the periodic table. All the elements in this group have similar electronic configurations hence, have same number of valence electrons.


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