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A nucleus of .84^210 Po originally at re...

A nucleus of `._84^210 Po` originally at rest emits `alpha` particle with speed `v`. What will be the recoil speed of the daughter nucleus ?

A

`4v//206`

B

`4v//214`

C

`v//206`

D

`v//214`

Text Solution

Verified by Experts

The correct Answer is:
A
Applying principle of conservation of linear momentum, `m_(alpha)+v_(alpha)+m_(N)v_(N)=0`
`4v+(210-4)v_(N)=0 or v_(NN)=(-4v)/(206)`
Negative sign for recoil speed.
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