After 1 a and 2 ß-emissions
(a) Mass number reduces by 4
(b) Mass number reduces by 5
(c) Mass number reduces by 6
(d) Mass number increases by 4
After 1 a and 2 ß-emissions
(a) Mass number reduces by 4
(b) Mass number reduces by 5
(c) Mass number reduces by 6
(d) Mass number increases by 4










