Nanotechnology 2

Test yourself on Nanotechnology 2

• Why are smaller quantities of nanoparticles able to be used compared to normal sized particles?

• Christiano reduces the side lengths of a cube by a factor of 10. How will this affect the surface area to volume ratio of the cube?

• Cube A has a surface area of 20 cm² and a volume of 30 cm³.
  Cube B has a surface area of 15 cm² and a volume of 45 cm³.
  Which cube has the larger surface area to volume ratio?

• Why do nanoparticles of a substance have special properties that normal sized particles of the same substance do not have?

• A chemist wants to use gold as a catalyst for a reaction. Which sample would make the better catalyst: a block of normal sized gold, or a sample of gold nanoparticles?