Chemistry - Solid State Question with Solution | TestHub

CCP is ABC ABC ..... type packing
A] In topmost layer, each atom is in contact with 6 atoms in same layer and 3 atoms below this layer.
B] Packing fraction$=\frac{4\times \frac{4}{3}\mathrm{ }\mathrm{\pi }{\mathrm{r}}^3}{{\left(\frac{4\mathrm{r}}{\sqrt{2}}\right)}^3}=\left(0.74\right)$
C] Each FCC unit has effective no of atoms = 4
Octahedral void = 4
Tetrahedral void = 8
D]$4\mathrm{r}=\mathrm{a}\sqrt{2}$