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The radioactive nuclide ""(90)""^(234)Th...

The radioactive nuclide `""_(90)""^(234)Th` shows two succesive `beta`-decay followed by one `alpha`-decay. The atomic nuimber and mass number respectively of the resulting atom is a)90 and 230 b)92 and 230 c)92 and 234 d)94 and 230

A

92 and 234

B

94 and 230

C

90 and 230

D

92 and 230

Text Solution

Verified by Experts

The correct Answer is:
C
`""_(90)Th^(234) overset(-beta)to ""_(91)X^(234) overset(-beta)to ""_(91)Y^(234) overset(-alpha)to ""_(90)Z^(230)`
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