Answer:
When identical particles pack in a simple cubic lattice, there is ONE particle per unit cell.
Step-by-step explanation:
As we know that simple cube has eight corners and each particle at every corner is shared by eight cubic crystals. So it means that only eighth part of a particle is present at one corner of each cube. Therefore, each corner contain 1/8 particle, then all corners will contain 1/8 × 8 = 1 particle.