Covalet Netwrok Solids

Question 1

Type of particle

Answer 1

Atoms

3D lattice structure, sometimes 2D lattice.

Question 2

Attractive force

Answer 2

Covalent bonds

Very strong covalent bonds.

Question 3

Melting point

Answer 3

Extremely high, required to break those covalent bonds.

Question 4

Are covalent network solids hard?

Answer 4

Yes, extremely hard and brittle as the atoms are held in a 3D network by strong covalent bonding.

Question 5

Are covalent networks solids soluble in solvents?

Answer 5

No, the covalent bonds are not broken by the attraction of solvent molecules.

Question 6

Do covalent molecules conduct electricity?

Answer 6

No, no charged particles (electrons or ions) free to move in the structure.

Graphite can as each C id bonded to only 3 their carbons there is one free valence electron for each C atom. These electrons are free to move within the structureand can conduct electricity.