c2

Question 1

how are alloys harder then pure metals?

Answer 1

in metals, atoms are arranged in layers in which atoms slide over eachother easily
in alloys, a different sized atom distorts layers and makes it harder for atoms to slide over eachother

Question 2

how many bonds does diamond have?
is diamond a conductor?

Answer 2

each carbon atoms has 4 other covalent bonds
no

Question 3

what is graphite?

Answer 3

sheets of carbon atoms arranged in hexagons
each carbon atom holds 3 bonds, conducts electricity
no covalent bonds between layers-> soft and slippery

Question 4

what is graphene?
what is a use of graphene?

Answer 4

single layer of graphite
can be used in electronics

Question 5

what is a fullerene?

Answer 5

molecules of carbon atoms arranged in hexagonal rings
however, they may contain rings with 5 or 7 carbon atoms

Question 6

what are carbon nanotubes?
what is a use?

Answer 6

cylinder fullerenes with high length to diameter ratio
can be used to deliver drugs into the body