How many atoms can be assigned to its unit cell if an element forms (i)body-centred cubic cell , (ii)a face-centred cubic cell.

How many atoms can be assigned to its unit cell if an element forms (i

1.	How many atoms can be assigned to its unit cell if an element forms (i)body-centred cubic cell , (ii)a face-centred cubic cell.
Answer» Solution :Atoms PER unit CELL in a body-centred CUBIC cell =`8xx1/8` (from corners )+ 1 (from body CENTRE )=2 Atoms per unit cell in a face-centred cubic cell=`8xx1/8` (from centres ) + `6xx1/2` (fromface centres ) =4