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NEETChemistryThe Solid StateClass 12

I keep getting “Types of crystalline solids” questions wrong in The Solid State. What's the trap?

assuming all solids conduct or melt similarly.

The usual trap: assuming all solids conduct or melt similarly. How to avoid it: the bonding type predicts hardness, melting point and conductivity. Go back to the definition — ionic (electrostatic), covalent-network (diamond), metallic (electron sea) and molecular (weak forces) solids differ hugely in hardness and conductivity.

Key point

Types of crystalline solids

Common mistake

assuming all solids conduct or melt similarly.

Memory tip

the bonding type predicts hardness, melting point and conductivity.

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More on The Solid State

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