The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

AHe+ (n=2)
BLi2+ (n=2)
CLi2+ (n=3)
DBe3+ (n=2)

where n=orbit ...?

Verified Answer :

Since the n^2/Z values are same for second orbit of Be^3+ and first orbit of H, their radii are also equal. Answer is option A.

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