structure and bonding of carbon.( Dimond, graphene, graphite, fullerene.)

Question 1

what is graphene?

Answer 1

form of carbon.
single layer of graphite.

Question 2

how are atoms arranged in graphene?

Answer 2

hexagonal structure.
one atom thick.

Question 3

what are the properties of graphene?

Answer 3

very strong.
good thermal and electrical conductor.
nearly transparent.

Question 4

what do the properties of graphene make it useful for?

Answer 4

electronics.
composite materials.

Question 5

what other molecules can carbon also form?

Answer 5

fullerenes which contain different numbers of carbon atoms.

Question 6

what is the structure of fullerenes based around?

Answer 6

hexagonal rings of carbon.

Question 7

what can sometimes the hexagonal rings of fullerenes contain?

Answer 7

5 or 7 carbon atoms.

Question 8

what shape do fullerene molecules have?

Answer 8

hollow; including; tubes, balls and cages.

Question 9

what structure are carbon nanotubes?

Answer 9

cylindric fullerenes with very high length diameter ratios.

Question 10

what do the properties of carbon nanotubes make them useful for?

Answer 10

use in nanotechnology.
electronics.
materials.

Question 11

what can fullerenes be used for?

Answer 11

deliver drugs around the body.
lubricants.
catalysts.
reinforcing materials eg: frames for tennis rackets- strong but lightweight.

Question 12

what is Dimond a form of?

Answer 12

carbon.

Question 13

what structure does diamond have?

Answer 13

giant.
rigid.
covalent structure.- lattice.

Question 14

what does each carbon atom form with what?

Answer 14

4 strong covalent bonds with other carbon atoms.

Question 15

what do all the strong covalent bonds in diamond mean?

Answer 15

its very hard substance with a very high melting point.

Question 16

why doesn’t diamond conduct electricity?

Answer 16

no charged particles.

Question 17

what is graphite?

Answer 17

another form of carbon.

Question 18

what does graphite have that means it has a very high melting point?

Answer 18

giant covalent structure.

Question 19

what does each carbon atom in graphite from with what?

Answer 19

3 covalent bonds with other carbon atoms.

Question 20

what does the 3 covalent bonds in graphite result in?

Answer 20

layered hexagonal structure.

Question 21

what are the hexagonal layers in graphite held together by?

Answer 21

weak intermolecular forces.

Question 22

what does it mean for the atom as it has weak intermolecular forces between atoms?

Answer 22

layers can slide past each other.
making graphite soft and slippery.

Question 23

one electron from each carbon atom in graphite is what?

Answer 23

delocalised.

Question 24

what do the delocalised electrons in graphite allow it to do?

Answer 24

conduct heat and electricity.