P. 4002. The starting isotope of a decay chain is 238U and the stable final isotope of this decay chain is 206Pb. How many decays, and how many decays occur in the decay chain?
Deadline expired on 11 October 2007.
Statistics on problem P. 4002. 128 students sent a solution.
3 points:99 students.
2 points:9 students.
1 point:14 students.
0 point:3 students.
Unfair, not evaluated:3 solutions.