For a certain radio-isotope the decay constant is .
CHEMISTRY · Multi-part · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear
Problem
For a certain radio-isotope the decay constant is λ=1.2×10−4s−1.
(a) Calculate its half-life in seconds and express the result also in minutes.
(b) Find its mean life.
(c) How much time (in seconds) will elapse before the number of undecayed nuclei falls to 12.5% of its initial value?