Chapter 8, Problem 55E

Interpretation Introduction

Interpretation:

The time required for the decay of technetium-99m to one eighth of its initial amount with a half-life of 6.0 hours is to be calculated.

Concept Introduction:

The half-life of a radioactive substance is the time in which the amount of the given radioactive substance is reduced to half of its initial value. The half-life for a given substance is represented by t_1/2.

After each half-life period, the amount of the substance is reduced to half of the initial number.