Question 6
[Maximum number: 1]
Which row about the properties of both diamond and silicon(IV) oxide is correct?
conductor
of electricity
type of
molecule
yes
giant covalent
yes
simple covalent
no
giant covalent
no
simple covalent
CAIE IGCSE Chemistry Diamond and Silicon Dioxide Properties
Practise relating the similar giant covalent structures of diamond and silicon dioxide to hardness, high melting points and electrical insulation.
How this is tested
- recognise diamond and silicon dioxide as similar three-dimensional giant covalent networks
- explain hardness and high melting point through many strong covalent bonds in the network
- explain poor conductivity because there are no mobile ions or delocalised electrons