Chapter 7: Allotropes of Carbon and Metallic Bonding

Fullerenes

are molecules of carbon, shaped like closed tubes or hollow balls.

Graphene

is a sheet of carbon atoms joined together in hexagons.

Substances

that are held together by metallic bonding include metallic elements and alloys.

shell

The electrons in the outer of the metal atoms are delocalised.

strong forces of electrostatic

There are attraction between the positive metal ions and the shared negative electrons.

Alloys

are harder and so more useful than pure metals.

fullerenes structure

The forms around another atom or molecule, which is then trapped inside.

Diamond

has a giant covalent structure, made up of carbon atoms that each form four covalent bonds.

Fullerenes

have a surface area, so they could make great industrial catalysts, individual catalyst molecules could be attached to the .

Fullerenes

can be used to ‘ cage other molecules.

Graphite

Contains sheets of hexagons

Graphene

One layer of graphite

Most metals are solid

__at room temperature

Metals are good

conductors of electricity and heat

Most metals are

malleable

Alloys are

____harder than pure metals

Buckminsterfullerene

First fullerenes to be discovered

Fullerenes function

is able to fit inside the hydrophobic cavity of HIV proteases, inhibiting the access of substrates to the catalytic site of enzymes

Diamond properties

very hard due to giant covalent structure