Diameter of pin = 1 x 10^4
Diameter of neon atom = 7.0 x 10^11
To find the number of neon atoms
The formula below will be used
[tex]\text{number of atoms }=\frac{diameter\text{ of pin}}{diameter\text{ of neon}}[/tex]Substituting values, it follows
[tex]n\text{umber of atoms }=\frac{1\times10^{-4}}{7.0\times10^{-11}}[/tex]Simplify the expression
[tex]\begin{gathered} \text{number of atoms }=\frac{1}{7}\times10^{-4-(-11)} \\ \text{number of atoms }=\frac{1}{7}\times10^{-4+11} \\ \text{number of atoms }=\frac{1}{7}\times10^7 \\ \text{number of atoms }=0.143\times10^7 \end{gathered}[/tex]Therefore, the number of atoms is 0.143 x 10^7
