Chapter 25, Problem 91SAE

Interpretation Introduction

Interpretation:

The decay constant of a substance is given as $4.28\times {10}^{-4}{h}^{-1}$ and the activity is given as $3.14\times {10}^5{s}^{-1}$. The number of atoms in the sample is to be calculated.

Concept introduction:

In nuclear reaction, one subatomic particle is bombarded on an atom and decay of parent nuclide starts. The process is known as radioactivity and can be calculated from the formula $-\frac{dNt}{dt}=\lambda Nt$.