Question

The number of $C{l}^{-}$ ions required to form ccp lattice of NaCl structure are

• A. 6
• B. 12
• C. 13
• D. 14

Answer 1

Answer: (D)

For forming ccp (fcc) lattice, $C{l}^{-}$ ions at the comers = 8 and $C{l}^{-}$ ions at the face centres - 6. Hence, total = 14