Complete the following nuclear changes :
(a) `""_(x)^(a) P to Q +_(-1)^(0) beta`
(b) `""_(92)^(238) U to_(90)^(234) Th +.....+ en ergy`
(c ) `""_(92)^(238) P overset (alpha)(to) Q overset (beta)(to) R overset (beta)(to) S`
(d) `""_(Z)^(A) X overset (alpha)(to) X_1 overset (gamma)(to) X_2 overset (2beta)(to) X_3`
(e) `"" X overset (beta)(to) X_1 overset (alpha)(to) X_2 overset (alpha)(to)_(69)^(172) X_3`

Answer

(a) `""_(x+1)^(a) Q` (b) `""_(2)^(4) He` (c ) `""_(90)^(234) Q, _(91)^(234) R, _(92)^(234) S` (d) `""_(Z-2)^(A-4) X_1, _(Z-2)^(A-4) X_2, _(Z)^(A-4) X_3` (e) `""_(71)^(176) X_2, _(73)^(180) X_1, _(72)^(180) X`