In a radioactive decay chain , the initial nucleus is . At the end there are 6 - particles and 4 - particles which are emitted. . If the end nucleus is , A and Z are given by :
A = 208 ; Z = 80
A = 200 ; Z = 81
A = 202 ; Z = 80
A = 208 ; Z = 82
α -decay -
- wherein
β plus decay -
- wherein
Initially
Let finially
So let reaction
Balance Z -
Balance A -
So A =208 and Z = 90
A = 208 ; Z = 80
Option 2)A = 200 ; Z = 81
Option 3)A = 202 ; Z = 80
Option 4)A = 208 ; Z = 82
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