Question

In a simple cubic lattice, the co-ordination number is :

• A. $4$
• B. $5$
• C. $6$
• D. $8$

Answer 1

The correct option is C $6$

In a simple cubic lattice, the co-ordination number is $6$ and it contains $1$ atom per unit cell. A particular lattice point co-ordinates with 4 lattice points in a plane, 1 above the plane and 1 below the plane i.e. co-ordinates total $6$ lattice points.