235 | W → | 235 | X→ | 231 | Y |
92 | 93 | 91 |
α and α
α and β
β and β
β and α
Correct answer is D
The decay process illustrated above shows that the lost β -particle to decay to the X by increase its atomic number ( from 92 to 93) and leaving the mass no. unaffected. There after, x decayed by -α emission to give Y, by decreasing the mass no. by 2 ( from 93 to 91).
Thus , the emission is β and α particles respectively