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

  • question_answer
    The given table shows a part of the periodic table
    Groups\[\to \] Periods\[\downarrow \] 1   2     3 to 12 13   14     15     16     17     18  
    2             Q   R
    3   P S     T     U
    Identify P, Q, R, T and U respectively.

    A)
    Mg O Ne P Ar

    B)
    O Mg Ar P Ne
                   

    C)
    Mg O Ar P Ne
                   

    D)
    O Mg Ne P Ar

    Correct Answer: A

    Solution :

                                              Element ?P? belongs to group 2 and period 3, so it should be magnesium (Mg). Element '0' belongs to group 16 and period 2, so it should be oxygen (O). Element 'R' belongs to group 18 (noble gases) and period 2, so it should be neon (Ne). Element ' T' belongs to group 15 and period 3, so it should be phosphorus (P). Element 'T' belongs to group 18 and period 3, so it should be argon (Ar).


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