The percentage of empty space in a body centred cubic arrangement is ________.
(i) 74
(ii) 68
(iii) 32
(iv) 26
The answer is the option (iii).
Packing efficiency for bcc arrangement is 68% which means that out of 100cc (let us assume) 68 cc of volume is occupied. So (100- 68) = 32 cc is empty space which gives us 32/100 i.e. 32%