Properties of Solids

AP Chemistry· difficulty 2/5

Quartz (SiO₂) is a network covalent solid where Si is covalently bonded to 4 oxygens, and each oxygen bridges two Si. This explains its

A
$High melting point and hardness$
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B
$Conductivity$
C
$Solubility in water$
D
$Low melting point$

Explanation

Network covalent solids require breaking covalent bonds to melt or fracture → high MP, hardness; insoluble in most solvents.

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