Carbon lattices and nanomaterials Ch 8

The type of bonding between atoms in diamond is:

• polar

• covalent

• network

• allotropic

An allotrope:

• is a structure with no consistent arrangement of particles.

• can also be called a buckyball.

• is also known as a fulerene.

• is a different structural form of the same element.

Graphite is used as a lubricant because:

• the bonding in graphite is weak and allows for particles to move readily.

• the bonding in graphite is strong within layers and weak between layers allowing for movement of layers over each other.

• it has delocalised electrons allowing easy movement of particles.

• it has a porous structure that allows for easy movement of particles.

15 mm in nm is:

•  $1.5\times10^7$  

•  $1.5\ \times10^6$  

•  $1.5\times10^{-7}$  

•  $15\times10^9$  

Which property would you not expect graphite to demonstrate?

• slippery

• soft

• sublimes

• non-conductive

Which substance would you expect to demonstrate the greatest ability to adsorb gas?

• graphite

• activated charcoal

• carbon nano-tubes

Which substance would you expect to be the hardest?

• graphite

• silicon dioxide

• amorphous carbon