Chapter 9, Problem 9.66QP

Interpretation Introduction

Interpretation:

Percentage of the initial radioactivity of cobalt-60 that will remain in year 2020 has to be estimated.

Concept Introduction:

With the knowledge of the initial mass of radioactive sample and the half-life of the radioisotope, the mass of the radioactive sample that remains after a period can be calculated using the equation given below,

    $m_f=m_i{(0.5)}^n$

Where,

    $m_f$ is the final mass of the sample or remaining mass of sample.

    $m_i$ is the initial mass of the sample.

    $n$ is the number of half-lives.