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Which hydrogen -like species will have ...

Which hydrogen -like species will have the same r adius as that of Bohr orbit of hydrogen atom ?

A

`n=2,Be^(3+)`

B

`n=2,Li^(2+)`

C

`n=2,He^(+)`

D

`n=3,Li^(2+)`

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The correct Answer is:
A
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