1.

The number of alpha beta -particles emitted in the nucleus reaction ._(92)U^(238) rarr ._(90)Th^(234) rarr ._(91)Pa^(234) are respectively

Answer»

1 and 1
1 and 2
2 and 1
2 and 2

Solution :`._(92)U^(238) rarr ._(90)Th^(234) rarr ._(91)PA^(234)`
No. of `alpha" particle" = (238 - 234)/(4) = (4)/(4) = 1`
No. of `beta " particle " = 91 - 90 = 1`


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