What is the number of atoms per unit cell in a body centred cubic structure ?

The number of atoms or lattice points per unit cell (Z) in different cubic unit cells of monoatomic substances can be calculated with the help of the following formula: Z=nc8+nb1+nf2+ne4where nc=number of atoms at the corner. nc=number of atoms at the body Centre.nc= number of atoms at the face Centre. nc=number of atoms at the edge Centre.For a body centered cubic structure: nc=8,nb=1,nf=ne=0∴ Z=88+11+02+04=1+1=2