Chapter 9.3, Problem 9.9Q

Interpretation Introduction

Interpretation:

Time elapsed has to be calculated if $25\mu g$ of molybdenum-99 remains from $200\mu g$.

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.