C4-11 Nanoparticles

One nanometre is the same as...

• 0.000000001m

• 1 x 10-6m

• 1 cm

• one tonne

In comparison to atoms are nanoparticles bigger or smaller than an atom?

• smaller
• irrelevant
• the same size
• bigger

What makes nanoparticles of a material behave differently compared to larger pieces of the same material?

• Lower surface area to volume ratio
• No change in behavior
• Different chemical composition
• Higher surface area to volume ratio

Which formula would I use to find the volume of the cube?

• side x side + side
• side x side x side or side^3
• side - side - side
• side / side x side

Which formula would I use to find the surface area of the cube?

• side x side + side
• side x side x side x side x side x side or side^6

• side x side - side

• side x side x 6

Which formula would I use to find the surface area to volume ratio of the cube?

• side x side + side
• side x side x side x side x side x side or side^6

• side x side - side

• side x side x 6 / side ^3

Nanoparticles have a very high surface to volume ratio. What does this mean?

• Equal surface area and volume
• Large amount of surface area compared to their volume
• No surface area compared to their volume
• Small amount of surface area compared to their volume

Why does the high surface to volume ratio of a nanoparticle affect the properties of the nanomaterial compared to bulk use of the material?

• The high surface to volume ratio increases the proportion of atoms at the surface, leading to different chemical and physical properties.
• The high surface to volume ratio decreases the proportion of atoms below the surface

• The high surface to volume ratio only affects the color of the nanomaterial
• The high surface to volume ratio has no effect on the properties of the nanomaterial

Which of these particles could be a nanoparticle?

• A particle with a size ranging from 1 to 100 micrometers
• A particle with a size ranging from 1 to 100 millimeters
• A particle with a size ranging from 1 to 100 centimeters
• A particle with a size ranging from 1 to 100 nanometers

Which of these particles is NOT a nanoparticle?

• 100 x 10^-9

• 10 x 10^-9

• 1000 x 10^-9

• 1 x 10^-9