Nanoparticles and Bulk materials

Question 1

how many atoms are in a nanoparticle

Answer 1

a few hundred atoms

Question 2

what are the 3 uses of nanoparticles?

Answer 2

sunscreen
sports equipment - tennis rackets - light and fast
drug delivery systems - buckyballs

Question 3

why are nanoparticles good catalysts

Answer 3

have high surface area to volume ratio

Question 4

what are some risks of catalysts?

Answer 4

can take a long time to break down inside your body

can attract toxic surfaces to its surface

are small so they can be breathed in or pass through wounds

can catalyse reactions in the body

Question 5

what are the 4 bulk materials?

Answer 5

glass ceramics
clay ceramics
polymers
metals

Question 6

what are some properties of the glass-ceramics?

Answer 6

transparent
hard but brittle
poor conductors of heat and electricity

Question 7

what are some properties of clay ceramics?

Answer 7

opaque
hard but brittle
poor conductors of heat and electricity

Question 8

what are some properties of polymers?

Answer 8

can be transparent or opaque
poor conductors of heat and electricity
tough and ductile

Question 9

what are some properties of metals?

Answer 9

can be polished to a shine
good conductors of heat and electricity
hard
tough and ductile

Question 10

what does ductile mean

Answer 10

can be bent twisted or stretched without cracking or breaking