Write two physical properties each.

a. Diamond

b. Charcoal

c. Fullerene

a. Physical properties of diamond:

• It is the hardest naturally occurring substance.
• Pure diamond is colourless, transparent, but brittle solid.

b. Physical properties of charcoal:

• It is a highly porous and brittle material
• It is a bad conductor of heat and electricity.

c. Physical properties of fullerene:

• They exist in the form of buckyballs and buckytubes.
• They are made up of 60 C atoms.