Explain: (i) The basis of similarities and differences between metallic and ionic crystals. (ii) Ionic solids are hard and brittle.
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The basis of similarities and differences between metallic and ionic crystals is that both of them have the electrostatic forces of attraction.
The basis of difference is the absence of mobile ions in ionic crystals and the presence of the same in the valence ones.
The Ionic solids are hard and brittle as there are electrostatic forces of attraction which exists between oppositely charged ions and is very strong.
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Ionic solids are hard and brittle. Answer: ... That is why both metals and ionic compounds are good conductors of electricity and have high melting points. The basis of difference is the absence of mobility of ions in the ionic crystals while the same is present in the valence electrons in case of metallic crystals.
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