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

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

1.	How may atoms can be assigned to its unit cell if an element forms (i)body-centred cubic cell (ii) a face -cenrtred cubic cell.
Answer» Solution :Atoms per unit cell in a body-centred CUBIC cell = `8 xx 1/8` ( from corners) + 1 ( from body CENTRE )= 2 Atoms per unit in a FACE- centred cubic cell =` 8xx 1/8 ` ( from corners) + ` 6 xx 1/2` ( from CENTRES ) = 4