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For hydrogen atom, radius of first Bohr'...

For hydrogen atom, radius of first Bohr's orbit is a for `Li^(2+)` the radius of first Bohr's orbit is

A

27a

B

3a

C

`a/27`

D

`a/3`

Text Solution

Verified by Experts

The correct Answer is:
D
`(r(H))/(r(Li^(2+)))=(Z_(Li^(2+)))/(Z_(H))`
`r(Li^(+2))=(Z_(H))/Z_(Li^(+2))r_(H)=(1xxa)/3=a/3`
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