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NEET Sample Paper NEET Sample Test Paper-5

  • question_answer
    Identify the least stable ion amongst the following.

    A)  \[L{{i}^{-}}\]                     

    B)  \[B{{e}^{-}}\]

    C)  \[{{B}^{-}}\]                      

    D)  \[{{C}^{-}}\]

    Correct Answer: B

    Solution :

    Be has full filled 2s-subshell \[(2{{s}^{2}})\] and therefore shows least tendency to accept an electron. Hence, \[B{{e}^{-}}\] is the least stable.


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