Chemistry - Solid State Question with Solution | TestHub

For a simple cubic unit cell, the atoms touch each other along the edges of the cube.

The relationship between the edge length $a$ and the radius of the atom $r$ is given by:

$a=2r$

Given that the edge length $a=380\text{ pm}$.

Substituting the value of $a$:

$r=\frac{a}{2}=\frac{380}{2}=190\text{ pm}$

Answer: 190.0 pm