The following equations represent part of a radioactive decay series:

1. 92238U β†’ A + 24He

2. A β†’ 91234Pa + B

3. 91234Pa β†’ C + –10e

4. C β†’ 90230Th + 24He

5. 90230Th β†’ D + 24He

6. D β†’ 86222Rn + E

7. 86222Rn β†’ 84218Po + F

8. 84218Po β†’ G + 24He

9. G β†’ 83214Bi + H

10. 83214Bi β†’ I + –10e

11. I β†’ J + 24He