Question
Chemistry Question on The solid state
Which one of the following statements about packing in solids is ?
A
Coordination number in bcc mode of packing is 8.
B
Coordination number in hcp mode of packing is 12.
C
Void space in hcp mode of packing is 32%.
D
Void space in ccp mode of packing is 26%.
Answer
Void space in hcp mode of packing is 32%.
Explanation
Solution
The hcp arrangement of atoms occupies 74% of the available space and thus has 26% vacant space.
So, the correct option is (C): Void space in hcp mode of packing is 32%.