1. DIAMOND There are NO MOLECULES This is a GIANT COVALENT NETWORK
Each carbon is covalently bonded to FOUR others
It is a tetrahedral arrangement
There are NO MOLECULES
This is a GIANT COVALENT NETWORK
To melt diamond you need to break huge number of covalent bonds (which requires lots of energy)
Carbon only has four electrons in its outer shell. These are all used in bonds so there are none free to conduct

2. GRAPHITE This is also a giant covalent structure
Each carbon covalently bonded to three others in LAYERS
Weak forces between layers
This is also a giant covalent structure
To melt graphite, covalent bonds must be broken
Each carbon is only bonded to 3 others so there are free electrons between the layers that can move

3. FULLERENE C60 This is a (big) MOLECULE Melting point about 300C
Other atoms (drugs?) can be held inside
Each carbon is covalently bonded to three others to there are free electrons on the surface of the ball…

4. NANOTUBES
NANOTECHNOLOGY

5. Material
Bulk
Nanoparticles
GOLD
Solid
Liquid
SILICON
Insulator
Conductor
COPPER
Opaque
Transparent