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The number of alpha and beta particles e...

The number of `alpha` and `beta` particles emitted in nuclear reaction `""_(90)Th^(228) rarr ""_(0)Th^(228)` are respectively

A

4,1

B

3,7

C

8,1

D

4,7

Text Solution

Verified by Experts

The correct Answer is:
A
`""_(90)Th^(238)to ""_(83)Bi^(212)+a ""_(2)He^(4)+b""_(-1)e^(0)`
`228=212 + 4a implies a=4`
`90=83+2a-bimplies b=1`
`alpha`-particles emitted, a=4
`beta`-particles emitted , b=1
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