At a given instant there are 25% undecayed radio-active nuclei in a sample
CHEMISTRY · Multi-part · US High School · Chemistry · Atomic Structure & Nuclear · Atomic Structure & Nuclear
Problem
At a given instant there are 25% undecayed radio-active nuclei in a sample. After 10 seconds the number of undecayed nuclei reduces to 12.5%. Calculate
(i) mean-life of the nuclei
(ii) the time in which the number of undecayed nuclei will further reduce to 6.25% of the reduced number.