Question

derive relationship between density and edge length for simple cubic unit cell

Answer 1

Density d=(zM)/(a^3Na)

Where a is the edge length

Na is the Avogadro no.

Z is the no. of atoms

Answer 2

General formula is

Z*M = a^3*d*No

Put value of Z=1 for simple cubic unit cell

d=M/a^3No

Here d=density

a=edge length

No=Avogadro's no.

M= molecular Mass