NEET Sample Paper NEET Sample Test Paper-16

  • question_answer 4) Which energy state of the triply ionized beryllium\[(B{{e}^{+++}})\]has the same electron orbital radius as that of the ground state of hydrogen? Given Z for beryllium = 4.

    A) n = 1                          

    B) n = 2  

    C)      n = 3              

    D)      n = 4              

    Correct Answer: B

    Solution :

    We know that Z = 4 and it is given that \[r={{a}_{0}}\] \[\therefore \]    \[{{a}_{0}}={{a}_{0}}\frac{{{n}^{2}}}{4}\Rightarrow {{n}^{2}}=4\Rightarrow n=2\] Hence, the correction option is (b).

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