Chapter 20.2, Problem 1PPB

Interpretation Introduction

Interpretation:

The mass of the given ${}_{79}^{197}\text{Au}$

atom is to be determined.

Concept introduction:

The mass defect is calculated by using the relation as:

$\Delta E=\left(\Delta m\right){\text{c}}^2$

Here, $\Delta m$ is the mass defect and c is the speed of light.

The mass of ${}_{79}^{197}\text{Au}$

is calculated by using the relation as given below:

${\text{Mass of }}_{79}^{197}\text{Au}=\text{Mass of }79\text{ protons}+\text{Mass of 118 neutrons}+\Delta m$