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The orbit having Bohr radius equal to 1s...

The orbit having Bohr radius equal to 1st Bohr orbit of H-atom is :

A

`n=2` of `He^(+)`

B

`n=2` of `B^(+4)`

C

`n=3` of `Li^(2+)`

D

`n=2` of `Be^(+3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`r_(n)=0.529 n^(2)/Z `
For hydrogen, `n=1` and `Z=1, :. r_(H)=0.529`
For `Be^(3+), n=2` and `Z=4, :. r_(Be^(3+))=(0.529xx2^(2))/(4)=0.529`
there, (D) is correct option.
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