Q)
Explain:(a)The basis of similarities and difference between metallic and ionic crystals.(b) Unit cell is not simply a cube of $4Na^+$ ions and $4Cl^−$ ions.(c) Can a cube consisting of $Na^+$ and $Cl^−$ ions at alternate corners serve as satisfactory unit cell for the sodium chloride lattice?(d) Ionic solids are hard and brittle.
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