Question
The ratio of number of closed packed atoms to the number of tetrahedral holes in cubic closed

The ratio of number of closed packed atoms to the number of tetrahedral holes in cubic closed
packing is
(1) 1: 1
(2) 1: 2
(3) 1: 3
(4) 2: 1
Solution

In CCP, No of atoms = 4 } Ratio = 4 : 8 = 1 : 2
No. of Tetra voids = 8