Consider Base Centered Cubic $($BCC$)$ Vanadium $($V$)$ crystal structure with an atomic radius $r_v=0\mathrm{.}205nm.$ The side of the cubic unit cell is $a=0\mathrm{.}473nm.$

The linear density along $[011]$ is atoms$/$nm

The linear density along $[111]$ is atoms$/$nm

The planar density in the plane $(110)$ is atoms $\frac{?}{n{m}^2}$

The planar density in the plane $(111)$ is atoms $\frac{?}{n{m}^2}$