Modelling exponential decay to predict half-life of radioactive substance

One of the most important characteristics of radioactivity is that it decays exponentially.  That is, the exponential decay of a radioactive substance represents a decrease in the quantity of the radioactive substance over time. In this paper, the study focuses on exponential decay modelling that is used to predict half-life of a radioactive material, that is, the time taken for half of the radioactive substance to decompose.