Chapter 1, Problem 1.27P

Interpretation Introduction

Interpretation:

The radius of a barium atom in angstroms $\left(\stackrel{\text{o}}{\text{A}}\right)$ is to be calculated.

Concept introduction:

Length is a physical quantity and its SI unit is meter. The other units of length are kilometer, centimeter, nanometer, picometer, miles. The conversion of one unit into another can be done using a proper conversion factor. Conversion factors are the ratios that relates the two different units of a quantity. It is also known as dimensional analysis or factor label method.

In the unit conversion problems, the given information is multiplied by the conversion factors to obtain the desired information. The unit conversion can be done as follows:

$\left(\cancel{\text{beginning unit}}\right)\left(\frac{\text{Final unit}}{\cancel{\text{beginning unit}}}\right)=\text{Final unit}$