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The energy associated and radius of firs...

The energy associated and radius of first orbit of `He^(+)` is `:`

A

`-54.38eV, 0.2645Å`

B

`-54.38eV, 0.529¯`

C

`-13.595 eV, 0.2645 Å`

D

`6.795eV, 0.2645Å`

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The correct Answer is:
A
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