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The Bohr orbit radius for the H-atom (Z=...

The Bohr orbit radius for the H-atom (Z=1) is approximately `0.53Å`. The radius for the first excited state orbit is:

A

`0.13Å`

B

`1.06Å`

C

`4.77Å`

D

`2.12Å`

Text Solution

Verified by Experts

The correct Answer is:
D
`r prop n^(2)z^(2)`
For H-atom Z=1
`r prop n^(2)`
`(r_(1))/(r_(2))=(n_(1))/(n_(2))`
`0.530/(r_(2))=(1^(2))/(2^(2))`
`:.r_(2)=0.530xx4=2.12Å`
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