Question

The number of molecules present in the unit cell of sodium chloride is:

• A. \( 5 \)
• B. \( 4 \)
• C. \( 8 \)
• D. \( 2 \)

Hint:

Each FCC unit cell of NaCl contains 8 molecules.

Answer 1

The Correct Option is C

The NaCl unit cell is a face-centered cubic (FCC) lattice with 4 Na+ and 4 Cl− ions per unit cell, leading to:
\[ \text{Total molecules} = 8 \]