Question

In a unit cell atoms A B C and D are present at corners face centres bodycentre and edge centres respectively.if atoms touching one of the plane passing through two diagonally opposite edges are removed then formula of compound is

Answer 1

by removing the plane passing through diagonally opposite edges
4 corners ,2face centres,1body centre and 2edge centres will be removed. therefore the effective atoms at corners wold be 4/8,at face centre4/2 and at edge centre 10/4.
A:B:C:D= 1:4:0:5
thus formula is AB4D5