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The radius of the first orbit of hydroge...

The radius of the first orbit of hydrogen atom is `0.52 xx 10^-8 cm`. The radius of the first orbit of `He^+` ion is

A

`0.26 xx 10^-8 cm`

B

`0.52 xx 10^-8 cm`

C

`1.04 xx 10^-8 cm`

D

`2.08 xx 10^-8 cm`

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