Chemistry - Solid State Question with Solution | TestHub

Since NaCl has a fcc structure, therefore each$\mathrm{N}{\mathrm{a}}^{+}$ion is surrounded by six$\mathrm{C}{\mathrm{l}}^{-}$ions at the corners of a regular octahedron and similarly each$\mathrm{C}{\mathrm{l}}^{-}$ion is surrounded by six$\mathrm{N}{\mathrm{a}}^{+}$ions. It is therefore, termed as a 6:6 arrangement.