JEE Main & Advanced JEE Main Paper (Held On 22 April 2013)

  • question_answer The  Order of increasing sizes of atomic radii among the elements O, S, Se and As is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[As-S<O<Se\]    

    B)  \[Se<S<As<O\]

    C)  \[O<S<As<Se\]   

    D)   \[O<S<Se<As\]

    Correct Answer: C

    Solution :

     On moving down in a group atomic radii increases due to successive addition of extra shell hence \[O<S<Se\] Further As is in group 15 having one less electron in its p orbital hence have higher atomic radii than group 16 elements. i.e., \[O<S<Se<As\]

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