Question

In NaCl crystal, Cl- ions are in FCC arrangement. Calculate the number of Cl- ions in its unit cell.

Answer 1

Answer:

In crystal of NaCl, the Cl ions are in FCC arrangement

So there are 8 Cl- ions at the 8 corners of the cube

And there are 6 Cl- ions at the 6 face centres of the cube

So there are a total of (8+6)=14 Cl- ions in the unit cell of the crystal.

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Answer 2

Answer:i attach answer below

Explanation: