`""_(92)"U"^(235)` undergoes successive disintegrations with the end product of `""_(82)"Pb"^(203)`. The number of `alpha` and `beta` particles emitted are

Options

A. `alpha=6,beta=4`
B. `alpha=6,beta=0`
C. `alpha=8,beta=6`
D. `alpha=3,beta=3`

Answer

D

Explanation

`""_(Z)^(A)Y overset(alpha)to ""_(Z-2)^(A-4)Yoverset(beta^(-))to ""_(Z+1)^(A-4)Y overset(beta^(-))to""_(Z)^(A-4)Y`
one `alpha`-particle and two `beta`-particles.