1.

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

Answer»

SOLUTION : `""_(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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