Which of these is a typical size for a nanoparticle?
5 × 10-6 m
5 × 10-9 m
5 × 10-12 m
What is the standard form for 0.000,000,008 m?
8 × 109 m
8 × 10-9 m
8 × 10-8 m
Which of these three numbers is the largest?
3 × 10-3 m
3 × 10-6 m
3 × 10-9 m
Which property of nanoparticles makes them excellent catalysts?
They are made from atoms
High density
High surface area to volume ratios
What is the surface area to volume ratio of a cube with side length 10 cm?
0.6
6
0.06
What happens to the surface area to volume ratio as the particle size decreases?
It gets smaller
It stays the same
It gets larger
What is the name of the carbon nanoparticle structure consisting of a single layer of carbon atoms?
Graphene
Graphite
Graphane
Which type of nanoparticle structure conducts electricity?
Nanotubes but not graphene
Graphene but not nanotubes
Nanotubes and graphene
Which of these is a use of carbon nanotubes?
Sports equipment
Sunscreen
Antibacterial socks
Which of these objects is the smallest?
Silver atom
Silver nanoparticle
Silver bar