Solution:
In (rock salt) :
Number of ions (at edge centers) (at body centre)
Number of ions (at corners)(at face centre)
Thus formula units per unit cell. excalcite
How many molecules are there in the unit cell of sodium chloride
In (rock salt) :
Number of ions (at edge centers) (at body centre)
Number of ions (at corners)(at face centre)
Thus formula units per unit cell. excalcite