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Bohr's radius for the H-atom (n =1) is ...

Bohr's radius for the H-atom (n =1) is approximately 0.53 Ã…. The radius of the first excited state (n=2) is :

A

`4.77`

B

`1.06`

C

`0.13`

D

`2.12`

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The correct Answer is:
D
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