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If velocity of an electronic in 1^(st) o...

If velocity of an electronic in `1^(st)` orbit of H atom is V, what will be the velocity of `3^(rd)` orbit of `Li^(+2)`-

A

`V`

B

`V//3`

C

`3V`

D

`9V`

Text Solution

Verified by Experts

The correct Answer is:
A
`V=2.188xx10^(6) Z/n m//s`
Now, `V prop Z/n` so, `V_(Li^(2+))/V_(H)=-(Z_(1)//n_(1))/(Z_(2)//n_(2))=(3//3)/(1//1)=1` or, `V_(Li^(2+))=V_(H)`
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