1.

The number of beta - particle emitted during the change ""_(a) X^(c) to ""_(a) Y^(b) is :

Answer»

`(a- b)/(4)`
`d + [ (a- b)/(2)]`
`d- a + [(C- d)/(2)]`
`d + [ (a- b)/(2)] - c`

SOLUTION :`""_(a) X^(c) to ""_(d) Y^(b) + x (""_(2) He^(4)) + y (""_(-1) beta^(0)) , x = ((c- b)/(4))`
`a = d + 2x - y , y = d + 2x -a , y = d + 2 ((c - b)/(4)) - a , , y =[d - a + (c- b)/(2)]`


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