Fill in the blanks:
$1.$ Density of unit cell $(d) = ........$
$2.$ Mass of atoms present in unit cell $(m) = ........$

(N/A) $1.$ The density $(d)$ of a unit cell is given by the formula: $d = \frac{Z \times M}{a^3 \times N_A}$,where $Z$ is the number of atoms per unit cell,$M$ is the molar mass,$a$ is the edge length of the unit cell,and $N_A$ is Avogadro's number.
$2.$ The mass of atoms present in a unit cell $(m)$ is given by: $m = \frac{Z \times M}{N_A}$,where $Z$ is the number of atoms per unit cell,$M$ is the molar mass,and $N_A$ is Avogadro's number.