1.

What are the characteristics of covalent network crystals?

Answer»

The characteristics of covalent network crystals are as follows :

  • The constituent particles in these solids are atoms. 
  • The atoms in these crystals are held by covalent bonds forming a rigid three dimensional network which gives a giant molecule. Hence, the entire crystal is a single molecule.
  • These crystals are very hard (or hardest) and most incompressible.
  • They have high melting points and boiling points.
  • Since the electrons are localised they are poor conductors of heat and electricity.
  • Example : Quartz (SiO2), diamond. 


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