Calculate the density of unit cell of sodium, if the edge length of cubic structure is 4.24 angstroms.

Explanation

To calculate the density of the unit cell of sodium with a body-centered cubic (BCC) structure, we can follow these steps:

### Step 1: Determine the number of atoms in the unit cell
In a body-centered cubic (BCC) structure, there are:
- 8 corner atoms, each contributing \( \frac{1}{8} \) of an atom to the unit cell.
- 1 atom at the center of the cube.

Total number of atoms per unit cell (n):
...