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The number of alpha" and "beta-prticles ...

The number of `alpha" and "beta`-prticles emitted in the nuclear rection
`""_(90)Th^(228) to ""_(83)Bi^(212)`.

Text Solution

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`""_(90)th^(228) overset(4 alpha)to ""_(82)Xi^(212)+ x xx He^(4)`
`""_(82)X^(212) overset(beta) to ""_(83)Bi^(212) + y""_(-1)e^(0)`
Number of decay, x = 4
Number of B decay, y = 1
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