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""(90)""^(228)Thto""(83)""^(212)Bi+alpha...

`""_(90)""^(228)Thto""_(83)""^(212)Bi+alpha+beta`. The no. of `alpha` and `beta` given out during the process are

A

`4alpha,7beta`

B

`4alpha,1beta`

C

`4alpha`

D

`7beta`

Text Solution

Verified by Experts

The correct Answer is:
b
During the emission of `alpha` particle `Zdarr` by 2 units and `Adarr` by 4 units
During the emmision of `beta` particle `Zuarr` by 1 unit and A doesn t change
`N=(N""_(0))/(2""^(n)),n=(t)/(t""_(1//2))=40/10=4`
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