Chapter 18, Problem 44AE

Interpretation Introduction

Interpretation:

Amount of $\text{cesium -137}$ present initially in sample has to be calculated.

Concept Introduction:

Half-life is time duration when concentration of reactant is reduced to half of its initial concentration. Radioactive substance decomposes thus for each successive half-life and becomes half of its earlier concentration and this reduction follows an exponential trend.

Initial concentration of a sample is amount of radioactive nuclide present before and decomposition or decay begins.