EDS Carbon

Which of these is a form of pure carbon?

• diamond

• sand

• wood

At room temperature all forms of carbon are

• solids

• liquids

• gases

Carbon has

• covalent bonds between its atoms

• ionic bonds between its atoms

• no bonds between its atoms

Diamond is

• softer than graphite

• harder than graphite

Carbon in a single layer of hexagons is called

• diamond

• graphite

• graphene

Which forms of carbon can conduct electricity?

• Diamond only

• Graphite only

• Graphite and graphene

• Graphene only

Which form of carbon can be used for writing and as a solid lubricant?

• graphene

• diamond

• graphite

Which form of diamond can be used for touch screens?

• diamond

• graphene

• graphite

Graphite can conduct electricity because

• all its electrons are in covalent bonds

• it has delocalised electrons that are free to move

Diamond cannot conduct electricity because

• all its electrons are in covalent bonds

• it has delocalised electrons that are free to move