Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Radioactive Decay Chain · USAPhO 2021 #7
Physics · nuclear-physics
Problem
A radioactive sample initially contains
N
0
=
10
6
N_0 = 10^6
N
0
=
1
0
6
atoms of isotope A, which decays to isotope B with half-life
t
1
/
2
=
10
min
t_{1/2} = 10\;\text{min}
t
1/2
=
10
min
. Isotope B is stable. How many atoms of A remain after
30
min
30\;\text{min}
30
min
? How many atoms of B have been produced?
Related theory
nuclear-physics
Browse the problem library