A) 13 Na atoms
B) 14 Na atoms
C) 8 Na atoms
D) 6 Na atoms
Correct Answer: D
Solution :
Each unit cell of\[NaCl\]consists of 6 chlorine atoms and 6 Na atoms. In\[NaCl\]each\[N{{a}^{+}}\]is surrounded by\[6C{{l}^{-}}\]ion at the comers of a regular octahedron and similarly each CR ion is surrounded by\[6N{{a}^{+}}\]ions. The co-ordination number of both ions are 6.
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