1. 2.1 Covalent Network Compounds
Silicon Carbide
LO: I know the bonding and structure of silicon carbide.

2. Silicon carbide can be described as:
a covalent
network
The bonding extends throughout the structure
a covalent
lattice
There is a regular repeating pattern of atoms.
The ratio of silicon to carbon atoms is 1:1 so the formula is
SiC
LO: I know the bonding and structure of silicon carbide.

3. Silicon dioxide
LO: I know the bonding and structure of silicon dioxide.

4. Silicon dioxide can also be described as:
covalent network a
covalent lattice
The ratio of silicon to oxygen atoms is so the formula is
1:2
SiO2
LO: I know the bonding and structure of silicon dioxide.

5. Properties and Uses
LO: I understand how the properties of covalent networks are related to their uses.

6. Silicon carbide and silicon dioxide have typical network properties:
Very high
melting point
Very
hard
Very
unreactive
linings
Silicon carbide is used to make furnace , abrasive and cutting
paper
disks
sandpaper
Silicon dioxide is used to make , building material ( ) and
stone
glass
LO: I understand how the properties of covalent networks are related to their uses.