Question

If A is the molecular mass of an element, a is the edge length and $N$ is the Avogadro's number, then the density for simple cubic lattice is :

• A. $\frac{2A}{N{a}^3}$
• B. $\frac{4A}{N{a}^3}$
• C. $\frac{A}{N{a}^3}$
• D. $\frac{A}{N{a}^2}$

Answer 1

The correct option is C $\frac{A}{N{a}^3}$

We have

density = $\frac{ZA}{N{a}^3}$

for, simple cubic lattice, we have number of atoms = 1

so, $z=1$

$density=$ $\frac{A}{N{a}^3}$