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Radius of first orbit of hydrogen is 0.5...

Radius of first orbit of hydrogen is `0.53 Å`. The radius in fourth orbit is:

A

`8.48 Å`

B

`2.12 Å`

C

`4.24 Å`

D

`0.193 Å`

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The correct Answer is:
A
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AAKASH SERIES-ATOMS-PRACTICE EXERCISE
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