Density of a solid

Density of a metallic solid depends on

1. Atomic mass

2. No. of atoms per unit cell

3. Vol. of unit cell

4. Mass of unit cell

Let the edge length of unit cell be 'a' cm

Gram Atomic weight of element = M gm mol^-1  

No. of atoms per unit cell = Z, N_A = Avogadro's number = 6.023 x 10²³, ρ or d = density of crystal

   [For cubic systems only]