The radius of the first Bohr orbit of hy...

The radius of the first Bohr orbit of hydrogen atom is `0.529Å`. The radius of the third orbit of H will be:

A

`8.46 Å`

B

`0.705 Å`

C

`1.59 Å`

D

`2.38 Å`

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The correct Answer is:

D

For H like particles like `He^(+)`
`r_(n) = (r_(H^(n^(2))))/(Z) =(0.59 Å xx (3)^(2))/(2) =2.38 Å`

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