Question

Changes following the reaction order 1 thorium, thorium radioactive decay half-life (234) was 24 days. Calculate the rate constant of decay? Calculate that 80% of the time decay of thorium decays?

Answer 1

k is decay constant

\[t _{1/2}=\frac{ \ln2 }{ k }\]

use the exponential decay formula:

\[A=A _{0}e ^{-kt}\]