$($a$)$ Atoms are very small compared to objects on the macroscopic scale. The radius of a rhodium atom is $134pm.$ What is this value in meters and in centimeters?

$m$ cm

$($b$)$ The mass of a single rhodium atom is $1\mathrm{.}71{10}^{-22}g.$ Suppose enough $Rh$ atoms were lined up like beads on a string to span a distance of $32\mathrm{.}8cm(13$inches $).$ How many atoms would be required? atoms

What mass in grams of $Rh$ would be used?

g

Could you weigh out this amount of rhodium using a typical laboratory balance?

$($c$)$ Taking the density of rhodium metal to be $12\mathrm{.}4\frac{g}{c}{m}^3,$ calculate the mass of metal needed to form a piece of Rh wire with the same length as the distance in b$,$ but with a diameter of $1\mathrm{.}50mm.$ Hint: The volume of a cylinder is $$ times its radius squared times its height. $(($:$V=r^{2}h\}$ g

How many rhodium atoms does this represent? atoms