Chemistry - Solid State Question with Solution | TestHub

In simple cubic, packing efficiency

$=\frac{\text{Volume of one atom}\times 100}{\text{Volume of unit cell}}$

$\text{=}\frac{\frac{\text{4}}{\text{3}}{\text{πr}}^{\text{3}}}{{\text{8r}}^{\text{3}}}\text{×}\text{100}\text{=}\frac{\text{π}}{\text{6}}\text{×}\text{100}\text{=}\text{52}\text{.4\%}$

where, r = radius of one sphere or atom.